Unit 2, Chapter 1: Atoms, Molecules and Compounds

Molecules are made up of:

• cells

• waves

• atoms of the same element

• atoms of different elements

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The center of the atom is called the:

• middle

• nucleus

• electron

• matter

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AMU stands for:

• Atomic Mass Units

• Atomic Moving Usable Energy

• Always Mind Unstable

• Astronomic Metric Units

The mass of an atom

• Is the mass of the protons and electrons added together.

• is the mas of the neutrons and electrons added together.

• is the mass of the neutrons and protons added together.

• none of these.

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The number of protons is equal to

• the number of electrons.

• the number of neutrons.

• the number of total atoms in a molecule.

• the AMU.

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The smallest part of an element is the

• atom.

• compound.

• period.

• nucleus.

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What is the building block of all matter?

• nucleus

• compound

• element

• atom

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The Periodic Table of Elements

• lists only the elements we can see and touch.

• lists all the elements that make up matter.

• does not list metals.

• does not list gases.

Molecules can be formed when what are joined together?

• molecules

• compounds

• atoms

• substances

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An element is made up of

• many types of atoms.

• many types of molecules.

• at least two types of atoms.

• one type of atom.

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