Unit 4 Exam Review

A double bond involves two pairs of electrons.

• True

• False

Covalent bonds involve the transfer of electrons.

• True

• False

A triple bond involves three and only three electrons.

• True

• False

Carbon atoms tend to make four bonds.

• True

• False

Tags

NGSS.HS-PS1-1

N₂ is an example of a compound with a double bond.

• True

• False

The horizontal rows on the periodic table are called groups or families.

• True

• False

The charge for the Magnesium ion is +2 because it loses two valence electrons.

• True

• False

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the statements about ionic solids is FALSE?

• Ionic solids conduct electricity when dissolved in water.

• Ionic solids have high melting points.

• Ionic solids are good conductors of electricity in their solid form.

• Ionic solids can be formed by reacting an alkali metal with a halogen.

• Ionic solids form crystals.

Which of the pairs of elements listed will NOT form an ionic compound?

• barium and iodine

• calcium and oxygen

• lithium and chlorine

• oxygen and hydrogen

• cesium and fluorine

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which particles in atoms have a negative charge?

• Neutrons

• Nucleus

• Electrons

• Protons