Chemical Bonds

In a chemical formula, the number of each type of atom in the compound is shown by numbers called _____?

• superscripts
• chemical symbols
• oxidation numbers
• subscripts

A group of covalently bonded atoms that acts together as one charged atom is a ______.

• crystal
• molecule
• negative ion
• polyatomic ion

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 ____. 

• chemical formula
• chemical symbol
• subscript
• superscript

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

• covalent
• ionic
• magnetic
• polyatomic

Name the following compound: CaBr₂

• calcium bromide
• calcium bromine
• carbon bromine
• none of these

The sum of the oxidation numbers in a neutral compound is always ____. 

• a negative number
• one
• a positive number
• zero

The oxidation number of an atom is shown with a ____. 

• negative number 
• positive number
• subscript
• superscript

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

• 2
• 4
• 6
• 8

What kind of chemical bond is formed when an exchange of electrons occurs?

• covalent
• hydrate
• ionic
• magnetic

What is the total number of atoms in the compound Ca(ClO₃)₂?

• 2
• 3
• 5
• 9