https://padlet.com/ranganathan_anu/rydgl9nbtxaq Share 1 thing you "think you know" and 1 question you have about chemical reactions below. en-us 2018-03-29 23:15:06 UTC 2024-11-05 13:09:59 UTC hello@padlet.com ranganathan_anu https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247411294 Choose any of the 4 chemical reactions below. Share what you see.]]> 2018-03-29 23:15:06 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247411294 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517242 The left side of the reaction contains the reactants. The right side contains the products. Both sides of the reaction must be balanced. Each reaction can move both ways, to the left or to the side. When the rate of the reaction is equivalent to the rate of the reverse reaction, the system is at equilibrium. Each reaction is either exergonic or endergonic, depending on its change in free energy, which can be calculated with the change entropy and enthalpy. All reactions have an activation energy, which can be lowered by utilizing catalysts. There are many times of reactions such as substitution reactions, etc. ]]> 2018-03-30 16:19:43 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517242 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517265 A chemical reaction is when two or more atoms re at towards each other in order to become stable. The left side has the reactive elements and the right side has the non reactive.

]]> 2018-03-30 16:19:52 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517265 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517267 A chemical reaction is when two or more chemicals interact/react with eachother. The end result of the reaction can be seen on the right side of all of the figures, which should be another chemical.]]> 2018-03-30 16:19:52 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517267 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517288 Chemical reaction is the reaction when atoms bond to each other. The left side of the periodic table are reactive elements, the right side are non reactive elements.]]> 2018-03-30 16:19:58 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517288 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517300 A chemical reaction is when two or more chemicals intreact or react with each other to create a substance.]]> 2018-03-30 16:20:05 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517300 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517304 a Reaction that occurs when atoms bond and creates substances ]]> 2018-03-30 16:20:06 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517304 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517317 Chemical reactions occur in bonded atoms (compound) and change the properties of the atoms.

]]> 2018-03-30 16:20:11 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517317 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517318 The right side of the reaction contains the result of the reactants chemically reacting. Molecules react with other molecules to form new molecules. ]]> 2018-03-30 16:20:11 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517318 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517319 Chemical reactions happen between two or more atoms.]]> 2018-03-30 16:20:12 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517319 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517327 They can explode  and it is the reaction when the atoms bond together]]> 2018-03-30 16:20:14 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517327 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517331 Chemical reactions form a new substance.]]> 2018-03-30 16:20:15 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517331 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517333 Chemical Reactions is when a molecules structure is rearranged. ]]> 2018-03-30 16:20:17 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517333 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517335 A chemical reaction changes the properties of both atoms.]]> 2018-03-30 16:20:17 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517335 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517340 I know chemical reactions happen for the purpose of making an atom stable, or to get eight valence electrons. Noble Gas have eight valence electrons, so they are quite stable. Thus, they do not usually react with other elements.]]> 2018-03-30 16:20:18 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517340 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517364 One result of chemical reactions are chemical bonds which is when 2 or more atoms are chemically bonded together.]]> 2018-03-30 16:20:23 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517364 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517366 A chemical reaction is a process where two substances react with each other to form a completely new substance]]> 2018-03-30 16:20:24 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517366 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517369 A chemical reaction is when a new substance is formed through the exposure of 2 or more elements. They bond to complete each other, but end up creating a new substance made of the same elements. 
Chemical reactions occur most with elements on the left side of the periodic table because they have the least # of valance electrons and tend to react with other elements more frequently and aggressively ]]> 2018-03-30 16:20:25 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517369 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517379 A chemical reaction is when the valence electrons interact with another atoms valence electrons]]> 2018-03-30 16:20:29 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517379 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517384 Chemical reactions occur in order to stabilize the atom by filling the atoms valence ring so that it’s full.]]> 2018-03-30 16:20:32 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517384 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517386 Chemical reactions happen when two substances cause a reaction when they are bonded or put together.]]> 2018-03-30 16:20:33 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517386 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517481 A chemical reaction is when two substances react with each other so that the arrangement of atoms in the substance changes. ]]> 2018-03-30 16:21:09 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517481 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517550 The left side is made of reactants which is what starts off before the chemical reaction. The right side is the products which is what is made when they react. ]]> 2018-03-30 16:21:41 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517550 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517610 Stephanie Z

A chemical reaction is the effect of when two atoms come together to form a new substance.]]> 2018-03-30 16:22:03 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517610 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517880 Why do chemical reactions happen?]]> 2018-03-30 16:23:37 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517880 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517886 How does the rearrangement of the atom should affect the substance? ]]> 2018-03-30 16:23:39 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517886 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517896 Why do chemical reactions have to happen in order for atoms to bond?]]> 2018-03-30 16:23:44 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517896 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517899 What determines how reactive the chemical reaction is]]> 2018-03-30 16:23:46 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517899 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517908 What happens inside the atoms when explosive chemical reactions occur?]]> 2018-03-30 16:23:48 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517908 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517932 What are some of the common chemical reactions? Why do atoms react violently sometimes?]]> 2018-03-30 16:23:54 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517932 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517948 What happenes when radioactive atoms bond?]]> 2018-03-30 16:23:57 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517948 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517950 What causes different atoms to be able to bond?]]> 2018-03-30 16:23:57 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517950 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517956 What affects the result of a chemical reaction?]]> 2018-03-30 16:23:58 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517956 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517969 A chemical reaction is when two substances react with each other to form a new substance.]]> 2018-03-30 16:24:02 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517969 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517970 What types of chemicals reactions are there? ]]> 2018-03-30 16:24:03 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517970 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517972 What kind of reactions occur?]]> 2018-03-30 16:24:05 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517972 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517974 What needs to be there for a chemical reaction to happen?]]> 2018-03-30 16:24:06 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517974 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517990 Does a chemical reaction change the substances properties?

- the chemical properties of the new substances are different from those of the original substances.

]]> 2018-03-30 16:24:13 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247517990 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518001 How does a chemicals properties affect the reaction which it creates?]]> 2018-03-30 16:24:18 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518001 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518003 How much energy does it take to have a chemical reaction?]]> 2018-03-30 16:24:19 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518003 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518009 Why are some elements more violent when they have chemical reactions (ex. Alkaline Metals and Water)?]]> 2018-03-30 16:24:21 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518009 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518084 How do chemical reactions occur?
Answer: A chemical happens when substncesa break apart or combine to form one or more new substances. New substances form when bonds break and new bonds form.]]> 2018-03-30 16:24:47 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518084 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518127 B, all the atoms bonded together and the blue ones are in the center]]> 2018-03-30 16:25:03 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518127 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518160 What kind of atoms are necessary in order for there to be a chemical reaction?]]> 2018-03-30 16:25:15 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518160 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518176 What are the different types of chemical reactions?]]> 2018-03-30 16:25:23 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518176 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518200 C. Two molecules react with each other. The result is two new substances with slightly different molecular arrangments.]]> 2018-03-30 16:25:31 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518200 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518224 b. Here we can see two different banded together to create a whole new one.]]> 2018-03-30 16:25:41 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518224 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518236 B.The atoms are bonding to form molecules]]> 2018-03-30 16:25:45 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518236 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518237 The two substances to the left are reacting and creating a chemical reaction. They are forming the substances on the right.(A)]]> 2018-03-30 16:25:45 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518237 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518250 How does a catalyst actually lower the activation energy of a reaction?]]> 2018-03-30 16:25:49 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518250 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518259 B: Two molecules chemically react to make another molecule which is both of the reactants connected to each other]]> 2018-03-30 16:25:52 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518259 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518260 In picture B it shows how two atoms are combined to create a new type of substance.]]> 2018-03-30 16:25:53 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518260 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518277 B - two atoms combine to make a new substance that have both atoms in it]]> 2018-03-30 16:26:00 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518277 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518280 B, The two different type of atoms bond covalently . They share their valence electrons with each other.]]> 2018-03-30 16:26:01 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518280 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518289 Why do chemical reactions occur]]> 2018-03-30 16:26:04 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518289 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518304 In picture B, two blue atoms and two white ones bonded to create a molecule with one blue atom and three white ones.]]> 2018-03-30 16:26:12 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518304 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518323 D, not all of the atoms from the originals elements are there, one red colored atom and a small white colored atom are missing in the end result of the bonding.]]> 2018-03-30 16:26:18 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518323 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518349 Why do chemical reactions occur?]]> 2018-03-30 16:26:32 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518349 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518377 A. The ethylene molecule is reacting with the oxygen gas, forming water and carbon dioxide. This reaction seems similar to the common cellular respiration reaction, except the glucose is replaced with the ethylene molecule.
Balanced Reaction: 
C2H4 + 3(O2) -> 2(CO2) + 2(H2O)]]> 2018-03-30 16:26:40 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518377 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518385 B. Two molecules reaction to make one molecule that includes the reactants. ]]> 2018-03-30 16:26:41 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518385 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518403 B. The atoms on the left bond to create a new substance on the right]]> 2018-03-30 16:26:44 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518403 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518413 B. The atoms bonded and created a new substance.]]> 2018-03-30 16:26:48 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518413 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518423 b. Two different kinds of atoms are combined to create a molecule]]> 2018-03-30 16:26:52 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518423 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518464 In picture A, the substances are bonding. But they are also creating new substances that have the same elements, but have different # of elements than the original compounds]]> 2018-03-30 16:27:11 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518464 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518478 B: All of the atoms bonded together to form a new substance]]> 2018-03-30 16:27:17 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518478 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518528 B. 4 molecules (blue & white) bonded together to form an even larger molecule.]]> 2018-03-30 16:27:44 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518528 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518647 What deter]]> 2018-03-30 16:28:33 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518647 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518924 A- The atoms are rearranged in a different order. Now the new atoms seem to have different properties. ]]> 2018-03-30 16:30:14 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247518924 ranganathan_anu https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247522384 After reading and annotating, you have the following options.
1) Answer the question you asked if the answer was in the reading
2) Write down something you learned from the reading below.
3) If your initial thinking under "think you know" is incorrect, fix it!
4) Re-explain the visual prompt with your understanding of the reading.

]]> 2018-03-30 16:54:08 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247522384 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247522488 2018-03-30 16:54:51 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247522488 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247523376 What kind of chemical bonds are there?
There are Exothermic which releases energy to its surrounding but Endothermic gains energy from its surroundings


]]> 2018-03-30 17:00:32 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247523376 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247523657 Exothermic: releases energy into surroundings 
Endothermic : gains energy form surroundings ]]> 2018-03-30 17:02:23 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247523657 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247523783 My initial question was : Is energy always released in chemical bonds? 
My answer now, after reading if that energy is only released in exothermic reactions, but in endothermic reactions, energy is taken in from the surroundings, not released. ]]> 2018-03-30 17:03:04 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247523783 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247524421 A chemical reaction happens when substances break apart or combine toform  one or more new substances. There is an exothermic reaction, where a reaction that gives off energy, and the endothermic reaction where a reaction takes energy. When writing the chemical formula it is important to check to make sure that it is correct. If something tiny is wrong, it could create a big difference to the chemical reaction.]]> 2018-03-30 17:06:37 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247524421 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247525118 Exothermic reactions is when reactions give off energy, and endothermic reactions are when reactions take in energy]]> 2018-03-30 17:09:37 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247525118 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247525715 Exothermic reactions occur when energy is released into its surroundings and endothermic reactions occur when energy is taken in from surroundings.]]> 2018-03-30 17:10:01 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247525715 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247525754 In the “K” part of the KWL I wrote that chemical reactions happen between two or more atoms. To add in to that, chemical reactions can happen when they bond or break apart because of the energy released.]]> 2018-03-30 17:10:15 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247525754 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247525784 I learnt that the total mass of the reactants and the total mass of the product(s) are equal]]> 2018-03-30 17:10:24 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247525784 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247525990 2. Exothermic reactions are reactions that give off energy, exo meaning out and Thermic meaning energy. An example would be wood burning, as it produces fire, which is heat and light. Endothermic reactions are reactions that take in energy, endo meaning in, and an example would be photosynthesis. During photosynthesis, the plant takes in sunlight(light energy).]]> 2018-03-30 17:11:47 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247525990 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247527281 1) Endothermic reactions absorb energy
2) Exothermic reactions give off energy

]]> 2018-03-30 17:15:54 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247527281 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247622090 A chemical reaction is when chemical bonds break apart and atoms rearrange themselves in order to create new substances. Nonmetals give off large amounts of energy during chemical reactions, and they can produce light, heat, and sound. ]]> 2018-03-31 19:26:01 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247622090 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247622252 Why does a chemical reaction between elements change the properties of the resulting substance? 

When a chemical reaction occurs, the atoms in different bonds rearrange themselves and create a bond with more atoms. So, the new product(s) has more atoms of different elements, and is thus a completely different compound and substance. ]]> 2018-03-31 19:28:39 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247622252 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247622307 b.) 
The blue molecule (which has two blue atoms)  combines with the white molecule (which has two white atoms) and produces a new molecule which contains two blue atoms and two white atoms. The blue and white molecules are reactants in a chemical reaction which leaves us a with a product that is a blue and white molecule. ]]> 2018-03-31 19:29:48 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247622307 https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247642762 A precipitate is a solid that is created from the chemical reaction of liquids. An exothermic reaction releases energy and an endothermic reaction takes in energy from its surroundings. The law of conservation of energy is the idea that energy can't be created or destroyed, instead, it changes forms. The law of conservation of mass states that during chemical reactions, mass can't be created ir destroyed. ]]> 2018-04-01 04:56:30 UTC https://padlet.com/ranganathan_anu/rydgl9nbtxaq/wish/247642762