https://padlet.com/smescience/81a8qg9wnnmtijvo Post its en-us 2021-10-28 16:42:35 UTC 2025-04-06 13:48:42 UTC hello@padlet.com https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853469892 *Chemical combination:
Calcium+carbonate---× calcium carbonate
*Chemical decomposition:
Calcium carbonate----× calcium+carbonate]]> 2021-10-29 08:18:01 UTC https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853469892 https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853469945 2021-10-29 08:18:04 UTC https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853469945 https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853470848 2021-10-29 08:18:47 UTC https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853470848 https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853470969 2021-10-29 08:18:52 UTC https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853470969 https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853471200 2021-10-29 08:19:03 UTC https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853471200 https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853472504 2021-10-29 08:19:57 UTC https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853472504 https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853472585 Chemical combination
Chemical Decomposition
Ex)2Mg+o2--------->@MgO
2HgO------->2Hg+o2]]> 2021-10-29 08:20:01 UTC https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853472585 https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853473113 1. Combination Reaction
Definition--In a chemical reaction, two or more substances combine to form a new product.
Example--Magnesium+Oxygen--> Magnesium Oxide
2. Decomposition Reaction
Definition-- A substance decomposes in a chemical reaction to form two or more new substances 
Example-- Calcium Carbonate-->Calcium Oxide+Carbon Dioxide]]> 2021-10-29 08:20:23 UTC https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853473113 https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853473542  combination, decomposition
EXAMPLE:  

• hdrogen + oxygen ---> water.
• iron + oxygen ---> rust.

]]> 2021-10-29 08:20:43 UTC https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853473542 https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853473620 2021-10-29 08:20:46 UTC https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853473620 https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853473770 Type of chemical reactions - 
1. Chemical Combination reaction-
When two or more elements or compounds react to form only one new substance. Example - C + O2 = CO2

2. Decomposition reaction - 
When a single compound decomposes to into two or more elements.
Example - CaCO3 = CaO + CO2

3. Displacement reaction

4. Double displacement reaction  

]]> 2021-10-29 08:20:53 UTC https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853473770 arushrdubey https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853473842 Types of Chemical reactions – Combination reaction; Decomposition reaction.

Reactions – Combination – Burning Magnesium ribbon
Decomposition – Electrolysis of water]]> 2021-10-29 08:20:56 UTC https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853473842 https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853474083 2021-10-29 08:21:06 UTC https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853474083 https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853474394 Types of chemical reaction -
1) Chemical composition or combination reaction - When two or more elements react chemically to form one new product ,the reaction which takes place is called chemical composition.
Ex- Fe + S  heat  FeS
Iron + sulphur ---> iron sulphide]]> 2021-10-29 08:21:21 UTC https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853474394 https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853474435
An acid and a base react with each other]]> 2021-10-29 08:21:23 UTC https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853474435 https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853474695

1 chemical decomposition
ex. Mercuric oxide on heating strongly decomposes to form  mercury and oxygen



]]> 2021-10-29 08:21:31 UTC https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853474695 https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853475575 Lohith 
Hemical reaction is the process in which reactanta get converted into products. :))
Types we learnt :- 
We learnt 2 types of chemical reaction , they are as follows :- 
Composition reaction :- it is the reaction in which multiple substances are changed into one substance ( in simple definition ) . It has multiple names :- synsthesis reaction , composition reaction , etc magnesium ribbon reaction .

Decomposition reaction:- it is the reaction in which ……………

]]> 2021-10-29 08:22:10 UTC https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853475575 https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853475737 ok

]]> 2021-10-29 08:22:18 UTC https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853475737 https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853475797 Learnt: 
Chemical Combination Reaction- When two or more substances react chemically to form one new product only, this reaction which then takes place is known as chemical combination reaction. Ex.-Burning of magnesium, Magnesium+Oxygen----->Magnesium oxide
Chemical Decompositon Reaction- When a single chemical compound decompes on heating oe by some other kind of energy to form two or more new substances.]]> 2021-10-29 08:22:21 UTC https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853475797 https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853476066 based on the breakdown of chemical reaction it is classified into type of chemical reaction-
1) chemical composition - reaction where two  or more elements or compounds  reacts to form new production  is chemical composition. ex -  carbon monoxide gas burns with oxygen to form carbon dieoxide .
2) decompistion - reactiosn where two or more elements or compounds breakdowns .
ex- when microorganism breakdown into simple ]]> 2021-10-29 08:22:32 UTC https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853476066 https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853476414 2021-10-29 08:22:45 UTC https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853476414 https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853476452 2021-10-29 08:22:46 UTC https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853476452 https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853476499 Deposition.  
Heats and creats new substances
Sodium nitrate -------》sodium mitrite + oxygen


Displacement.


]]> 2021-10-29 08:22:48 UTC https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853476499 https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853477987 2 types of chemical reactions:
1) Chemical decomposition:
Mercuric oxide --(heat)--> Mercury+ oxygen

2) Combination reaction:
Calcium carbonate --(heat)--> Calcuim oxide+ Carbon dioxide]]> 2021-10-29 08:23:49 UTC https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853477987 https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853478997 composition reaction :-when two or more reacts chemically to form a reaction .ex-  c+o=ca2
decomposition reaction when one chemical compound is reacted it forms a single compound . :- ex- 2 h2O+2h2+o2]]> 2021-10-29 08:24:34 UTC https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853478997 https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853484573 Its incredible, its meeee]]> 2021-10-29 08:28:30 UTC https://padlet.com/smescience/81a8qg9wnnmtijvo/wish/1853484573