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CP Chemistry MIdterm
Midterm Review Chapters 7-9
| Question | Answer |
|---|---|
| How many valence electrons does group 16 elements have? | 6 |
| How many valence electrons does group 1 elements have? | 1 |
| How many valence electrons does group 13 elements have? | 3 |
| How many valence electrons does group 18 elements have? | 8 |
| How many valence electrons does group 2 elements have? | 2 |
| What is the charge on a group 1 element? | +1 |
| What is the charge on a group 2 element? | +2 |
| What is the charge on a group 13 element? | +3 |
| What is the charge on a group 14 element? | +/- 4 |
| What is the charge on a group 15 element? | -3 |
| What is the charge of a group 16 element? | -2 |
| What is the charge of a group 17 element? | -1 |
| What does the octet rule state? | in chemical compounds, atoms tend to have eight electrons in their highest energy level |
| In what kind of bond do oppositely charged ions attract? | ionic bond |
| What is the net charge on NaCl? | 0 (neutral) |
| Name 3 qualities of ionic compounds. | 1. salts 2. composed on anions and cations 3. held togethre by ionic bonds |
| Write the formula for aluminum nitride? | AlN |
| Metals and nonmetals bonded together create what kind of compound? | ionic compounds (metals are cations and nonmetals are anions) |
| In what kind of bond are electrons shared? | covalent |
| In what kind of bond are electrons transferred? | ionic |
| Name the 7 diatomic gases? | hydrogen, nitrogen, oxygen, fluorine, chlorine, bromine, and iodine |
| Why do attons share electrons in covalent bonds? | to attain eight electrons in their highest enegy level |
| What so we call a pair of valence electrons that do not participate in bonding? | unshared pair |
| How many dots would be on the lewis dot diagram for Nitrogen? | 5 |
| What is the formula for potassium sulfate? | K2SO4 |
| What is the formula for magnesium bromide? | MgBr2 |
| What is the name of the compound formed from sodium and phosphorus? | sodium phosphide |
| What is the geometric shape of water that explains its polarity? | bent |
| Place these elements in order of increasing electronegativity: Ag, Rb, O | Rb, Ag, O |
| What produces new substances? | a chemical reaction |
| What describes chemical reactions using formulas and symbols? | chemical equations |
| In a chemical equation, where are the reactants found? | to the left of the arrow |
| In a chemical equation, where are the products found? | to the right of the arrow |
| Why do we balance chemical equations? | to satisfy to Law of Conservation of Mass |
| What must be equal on each side in order for a chemical equation to be balanced? | the numbers of atoms of each element |
| What type of reaction is the combination of 2 or more substances to form a compound and has only one product? | combination |
| What type of reaction happens when a compound breaks down into 2 or more simpler substances and has only one reactant? | decomposition |
| What type of reaction happens when one element replaces another in a compound? | single replacement |
| What type of reaction has the ions in two compounds “change partners.” The cation of one compound combines with anion of the other? | double replacement |
Created by:
ssuriano
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