Q3 Test 1 Review - Atoms and Periodic

The smallest particles of matter are called

• neutrons

• atoms

• electrons

• protons

What does the atomic number represent?

• how many atoms are in a group.

• how much an atom weighs.

• the number of protons in the nucleus of the atom.

The smallest unit of a pure substance that has the properties of that substance

• element
• atom
• neutron
• compound

The nucleus is made up of -

• neutrons and electrons
• protons and neutrons
• protons and electrons
• electrons and quarks

Which of the following are made of atoms?

• All matter

• All energy

• All matter and energy

• Only living things

True or False: Electrons are found in the nucleus.

• True

• False

One Calcium atom has 20 protons. This means Calcium has

• 20 neutrons

• 20 electrons

• an atomic mass of 20

• an atomic number of 5

The element Neon has an Atomic number of 10 and an atomic mass of 20. How many neutrons are in the element neon?

• 10

• 5

• 30

• 7

This contains most of the mass of an atom

• Electron Cloud
• Nucleus
• Electron

True or False: The majority of an atom is made up of empty space

• True
• False