An atom becomes an _____ when it gains or loses electrons.

• ion

• proton

• electron

• neutron

An atom that loses an electron becomes a ___________ ion.

• negative

• positive

• neutral

An atom that gains an electron becomes a ___________ ion.

• negative

• positive

• neutral

The type of bond that is formed when one atom transfers electrons to another atom is called:

• covalent

• ionic

The type of bond that is formed when one atom shares electrons with another atom is called:

• covalent

• ionic

The outermost electrons are called the __________ electrons.

• reacting

• outside

• valence

• contact

What are the properties of Ionic compounds?

• 3-D crystal shape, high melting point, electrical conductivity

• Weak bonds, polar and non-polar compounds

How many Sodium (Na+) ions are needed to balance the charge of one Chlorine (Cl-) ion? (Think: the ratio of Na to Cl in the chemical formula for salt)

• three

• two

• one

A __________ compound is formed with covalent bonds.

• Ionic

• Molecular

Tags

NGSS.MS-PS1-1

Which are examples of Molecular Compounds?

• Lithium Flouride, Magnesium Oxide

• Water

• Table Salt

• Methane, Carbon Dioxide

• Sugar

Tags

NGSS.MS-PS1-1