What is a compound?

• A single element found in nature

• Two or more elements chemically combined

• A mixture of gases

• A type of molecule found in plants

Tags

NGSS.MS-PS1-1

What is the reason noble gases are nonreactive?

• They have empty outer energy levels.

• They have full outer energy levels.

• They need to lose electrons.

• They have a high number of protons.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Ionic bonds usually form between which types of elements?

• A metal and a nonmetal

• Two metals

• Two nonmetals

• A gas and a liquid

Covalent bonds usually form between which types of elements?

• A metal and a nonmetal

• Two metals

• Two nonmetals

• A gas and a liquid

What is an ion?

• An atom or molecule with no charge

• An atom or molecule that has a charge due to having lost or gained electrons

• A molecule that has gained protons

• An atom that has lost neutrons

Which element in the provided diagram has four valence electrons?

• Hydrogen (H)

• Carbon (C)

• Boron (B)

• Chlorine (Cl)

Tags

NGSS.HS-PS1-1

How many valence electrons are shown in the diagram?

• 16

• 7

• 6

• 2

Tags

NGSS.HS-PS1-1

Ionic Bonding is the _________ of electron/s between atoms.

• sharing

• transfer

• loose

• gain

This refers to the tendency of atoms to prefer to have eight electrons in the valence shell

• Octet rule

• Valence electron

• Electronegativity

• Lewis symbol

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

If an atom loses two electrons what charge will it have?

• -1

• -2

• +1

• +2

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2