Compounds & Chemical Reactions

The properties of a compound are the same as the properties of the elements making up the compound.

• True

• False

A water molecule is a polar molecule because it has a slight positive charge at one end and a slight negative charge at the other end.

• True

• False

Particles formed from covalent bonding are called ions.

• True

• False

A chemical symbol is the abbreviated way to write a compound's name.

• True

• False

A chemical equation shows a chemical reaction using symbols instead of words.

• True

• False

An enzyme is an example of an inhibitor.

• True

• False

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

• Ionic

• Covalent

• Polyatomic

• Magnetic

Tags

NGSS.HS-PS1-1

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

• 2

• 4

• 6

• 8

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Elements in Group 1, the alkali metals, are very reactive because their atoms have _________ valence electrons.

• 0

• 1

• 7

• 8

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

• 3

• 4

• 7

• 12

Tags

NGSS.MS-PS1-1