Unit 6 Final Exam Review

In a chemical formula, the number of atoms of each element in the compound is shown by numbers called ____.

• chemical symbols

• oxidation numbers

• superscripts

• subscripts

The elements that make up a compound and the exact number of atoms of each element in a unit of the compound can be shown in a ____.

• subscript

• superscript

• chemical symbol

• chemical formula

A chemical bond that occurs when atoms share electrons is a(n) ____ bond.

• polyatomic

• magnetic

• covalent

• ionic

A chemical bond that occurs when atoms transfer electrons is a(n) ____ bond.

• polyatomic

• covalent

• ionic

• magnetic

How many electrons are needed in the outer energy levels of most atoms for the atom to be chemically stable?

• 2

• 4

• 6

• 8

How many hydrogen atoms are present in one molecule of ammonium acetate, NH₄C₂H₃O₂?

• 11

• 7

• 4

• 12

How many calcium atoms are present in 4Ca(C₂H₃O₂)₂?

• 1

• 8

• 4

• 6

How many carbon atoms are present in 4Ca(C₂H₃O₂)₂?

• 1

• 8

• 4

• 16

How many hydrogen atoms are present in 4Ca(C₂H₃O₂)₂?

• 3

• 4

• 6

• 24

How many oxygen atoms are present in 4Ca(C₂H₃O₂)₂?

• 8

• 4

• 16

• 24