Periodic Table

Which sentence best describes an atom?

• A group of particles

• A large particle made of protons

• An atom is made of neutrons

• The smallest particle in which an element can exist

What particles can you find in the nucleus of an atom?

• Protons

• Electrons

• Neutrons

• Shells

How many neutrons are in this atom?

• 2

• 20

• 40

What is the mass number of this atom?

• 21

• 24

• 45

The number of electrons is usually equal to the number of neutrons.

• True

• False

What group is silicium (Si) in?

• 2

• 14

• 16

• 18

Elements in the Periodic Table are divided into groups and periods. The period number tells us the number of...

• Electrons in the outer shell

• Outer shells

• Electron shells

• Proton shells

What is the atomic number of zinc (Zn)?

• 4

• 12

• 30

• 50