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

• 2
• 8
• 6
• 18

Tags

NGSS.HS-PS1-1

Hydrogen needs _____ electrons in its valence shell to be stable.

• 4
• 6
• 8
• 2

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the correct formula for this molecule?

• NH
• N₃H
• NH₃
• NH₄

Tags

NGSS.MS-PS1-1

How many covalent bonds does carbon need to form in order to have a full octet?

• 2
• 3
• 4
• 5

Tags

NGSS.HS-PS1-1

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

• three pairs of electrons shared between two atoms

Covalent compounds

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

Tags

NGSS.HS-PS1-2

NH₃ has how many lone pairs?

• 0

• 1

• 2

• 3

Tags

NGSS.MS-PS1-1

How many valence electrons does nitrogen have?

• 3
• 2
• 5
• 1

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is it called if there are three-pairs of electrons being shared?

• Triple bond

• Trigonal bond

• Tri-bond

• Three bonds

What two types of atoms make a covalent bond?

• 2 Nonmetals
• 1 Nonmetal & 1 Metal
• 2 Metals
• 2 Noble Gases

Tags

NGSS.MS-PS1-1