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CP Chemistry MIdterm

Midterm Review Chapters 7-9

QuestionAnswer
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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