Periodic Table Simple Review

Choose all of the items that are compounds.

• NaCl (table salt)

• Sulfur

• O₂

• Water

• Air

How many protons and electrons does nickel have?

• 28

• 58.69

Sodium (Na) is found in period 

• 3
• 2
• 4
• 1

Sodium (Na) is found in group 

• 1
• 2
• 3
• 4

Which is an electron?

• A
• B
• C

Which is a proton?

• A
• B
• C

Which is a neutron?

• A
• B
• C

What is the number of protons that the element in this image contain?

• 14
• 7
• 15
• 18

An atom of the element with atomic number 6 always has _____.

• six protons in its nucleus
• an atomic mass of six
• more than six neutrons
• six electron clouds

How many protons does this element have?

• 40
• 21
• 20
• 41