Chapter 19: Chemical Bonds

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

• subscripts

• superscripts

• oxidation numbers

• chemical symbols

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

• negative ion

• polyatomic ion

• molecule

• crystal

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

Tags

NGSS.MS-PS1-1

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

• magnetic

• polyatomic

• ionic

• covalent

Tags

NGSS.HS-PS1-1

Name the following compound: CaBr₂

• calcium bromine

• calcium bromide

• carbon bromine

• none of these

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

• a positive number

• a negative number

• one

• zero

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

• negative number

• subscript

• superscript

• positive number

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

• 8

• 6

• 4

• 2

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

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

• covalent

• hydrate

• magnetic

• ionic

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

• 9

• 3

• 2

• 5

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5