https://padlet.com/maddenc/3qx9t5qbgrwp en-us 2016-10-31 16:46:57 UTC 2016-12-01 00:14:20 UTC hello@padlet.com maddenc https://padlet.com/maddenc/3qx9t5qbgrwp/wish/134289516 1. What is a covalent bond? When they share electrons 
2. Explain the difference between a nonpolar and polar covalent bond.nonpolar covalent bonds are a type of chemical bond where two atoms share a pair of electrons with each other. polar covalent bonding is a type of chemical bond where a pair of electrons is unequally shared between two atoms.
3. What does it mean when atoms form a single covalent bond? one pair double covalent bond? two pair triple covalent bond? three pair]]> 2016-10-31 16:48:02 UTC https://padlet.com/maddenc/3qx9t5qbgrwp/wish/134289516 maddenc https://padlet.com/maddenc/3qx9t5qbgrwp/wish/136176208 1. Compare and contrast physical and chemical changes. physical is what you see on the outside and chemical is making a whole new substance
2. What are the signs that a chemical reaction has occurred?  Formation of a Precipitate. There are a number of observations that indicate a chemical reaction has occurred One is the formation of a precipitate. A precipitate is a solid formed in a chemical reaction that is different from either of the reactants.
3. Compare and contrast endothermic and exothermic reactions.endothermic keeps heat in and endothermic keeps it out]]> 2016-11-08 17:42:28 UTC https://padlet.com/maddenc/3qx9t5qbgrwp/wish/136176208 maddenc https://padlet.com/maddenc/3qx9t5qbgrwp/wish/136817913 1. What is a chemical equation? A chemical equation is the symbolic representation of a chemical reaction in the form of symbols and formulae, wherein the reactant entities are given on the left-hand side and the product entities on the right-hand side.
2. What are reactants? a substance that takes part in and undergoes change during a reaction. Where do you find them in a chemical equation? 
3. What are products? A product in science is a substance that is formed when two or more chemicals react.  Where do you find them in a chemical equation?
4. What is the conservation of mass? The law of conservation of mass states that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations. According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants.
5. Identify the 4 steps used to balance chemical equations? write the equation, count the number of atoms, add coefficients to balance atoms , look back and check]]> 2016-11-10 17:37:57 UTC https://padlet.com/maddenc/3qx9t5qbgrwp/wish/136817913 maddenc https://padlet.com/maddenc/3qx9t5qbgrwp/wish/140897798 1. What is an ion? atom or molecule with a net electric charge due to the loss or gain of one or more electrons. How does an ion form? ions are electrically charged particles formed when atoms lose or gain electrons.
2. What type of elements form negative ions? nonmetals What type forms positive ions? metals
3. What is an ionic bond? A ionic bond is the complete transfer of valence electrons between atoms. What holds ionic bonds together?  it is the opposite charge of the ions that attracts them to one another and hold them together
4. What are the properties of ionic compounds? positive and negative ions
5. When writing the chemical formula of an ionic compound which ion is listed first? positive ions then negative ions]]> 2016-11-30 17:43:25 UTC https://padlet.com/maddenc/3qx9t5qbgrwp/wish/140897798