Unit 6.1 Review 2026

In a covalent bond, electrons are __________, while in an ionic bond they are ____________

• transferred; shared

• shared; transferred

• created; destroyed

• destroyed; created

Tags

NGSS.HS-PS1-1

What are covalent molecules made of?

• only metals

• only nonmetals

• metals + nonmetals

Tags

NGSS.MS-PS1-1

Covalent molecules can be...

• only solids

• only liquids

• only gases

• any state of matter

Tags

NGSS.MS-PS1-4

Ionic molecules have a _______ melting point while covalent have a _______ melting point

• low; high

• high; low

Tags

NGSS.HS-PS1-3

T/F: covalent molecules will conduct electricity when dissolved in water

• True

• False

According to the Octet Rule, atoms want ____ electrons in their outermost energy level or shell.

• 2

• 4

• 6

• 8

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

When atoms LOSE electrons, they get a...

• Positive (+) charge

• Negative (-) charge

• No charge (zero)

Tags

NGSS.HS-PS1-7

Which 2 atoms are EXCEPTIONS to the Octet Rule and only need 2 valence electrons?

• H, Na

• H, He

• He, Ne

• There are no exceptions to the Octet Rule

N_2, Cl_{2, and} O₂ are all 

• diatomic molecules.
• ionic bonds.
• of equal mass.
• solids.

Tags

NGSS.MS-PS1-1

Diatomic molecules are __________ found in nature as their single element: I, O, N, H, Br, Cl, or H.

• often
• never
• sometimes
• always