Ionic and Covalent Bonds and Lewis Dot

According to the octet rule most elements need _______ valence electrons.

• 2
• 8
• 6
• 18

Metals and nonmetals form which kind of bond?

• Polar covalent
• Ionic
• Non-polar covalent
• Metallic

Tags

NGSS.HS-PS1-1

What is the correct formula for this molecule?

• NH
• N₃H
• NH₃
• NH₄

Tags

NGSS.MS-PS1-1

How many valence electrons do elements in Group 2A have?

• 12
• 4
• 1
• 2

How many electrons does each line indicate are shared?

• 1
• 2
• 3
• 4

Tags

NGSS.HS-PS1-2

How many electrons do atoms need to be stable?

• 1
• 2
• 6
• 8

Covalent compounds

• Share electrons
• transfer electrons
• contain a sea of electrons
• conduct electricity

What is a double bond?

• a bond between two atoms
• one pair of electrons shared between two atoms
• two pairs of electrons shared between two atoms
• James Bond's brother

Choose all of the covalent molecules below.

• H₂O

• C

• Br₂

• CCl₄

Tags

NGSS.MS-PS1-1

Atoms are MORE STABLE when they are combined.

• True

• False