Unit 2 Study Guide

What is an element?

• A substance that can be broken down into singular atoms.

• Any two or more nonmetal atoms that are sharing electrons.

• Any two or more different atoms bonded to each other.

• Two or more pure substances that are not chemically bonded together.

What is a mixture?

• Any two or more nonmetal atoms that are sharing electrons.

• Two or more pure substances that are not chemically bonded together.

• A substance that can be broken down to one single atom.

• Any two or more different atoms bonded to each other.

What is a compound?

• Two or more pure substances that are not chemically bonded together.

• A substance that can be broken down to one single atom.

• Any two or more different atoms that are bonded together.

• Any two or more nonmetal atoms that are sharing electrons.

What is a molecule?

• Any two or more nonmetal atoms that are sharing electrons.

• Two or more pure substances that are not chemically bonded together.

• A substance that can be broken down into one single atom.

• Any two or more different atoms that are bonded together.

In this compound Fe₂O₃, which elements combine to form rust?

• Iron and water

• Iron and Oxygen

• Iron and air

• Iron and acid

What does each sphere in this molecular model represent?

• An atom

• A compound

• A nucleus

• An ion

What is this?

• Molecule

• Atom

• Compound

• Plant Cell

What type of structure is this?

• An atom

• A molecule

• A cell

• A compound

Calcium carbonate (CaCO₃) is considered a compound because it is made up of two or more what?

• Molecules

• Elements

• Gases

• Solids

Which of these is a chemical compound?

• Aluminum

• Carbonated Water

• Sodium Chloride

• Carbon-14