What type of compound is Al₂O₃?

• ionic compound

• covalent compound

• metallic compound

• none of the above

What type of compound is CO₂?

• ionic compound

• covalent compound

• metallic compound

• none of the above

Silicon is classified as a

• metal

• nonmetal

• metalloid

Hydrogen is classified as a

• metal

• nonmetal

• metalloid

Tags

NGSS.HS-PS1-1

Which of the following is most likely to form an ionic compound with phosphorus? Select all that apply.

• lithium

• oxygen

• iron

• boron

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following elements has a full octet of electrons and is unlikely to form chemical bonds?

• Hydrogen

• Carbon

• Boron

• Neon

Tags

NGSS.HS-PS1-1

Which of the following is a property of ionic compounds? Select all that apply.

• Good conductors when melted or dissolved in water

• High melting point

• Malleable

• Ductile

Tags

NGSS.HS-PS1-3

Which of the following is a property of metallic substances? Select all that apply.

• Brittle

• High melting point

• Malleable

• Ductile

Which of the following is a cation?

• Ca

• CO₃ ^2-

• Ca²⁺

• N^3-

What is an anion?

• A negatively charged ion

• A positively charged ion

• A neutral ion

• A neutral atom