Atomic Structure - Key Concepts

What is the number of protons?

• 4
• 5
• 9
• 13

What is the number of neutrons?

• 4
• 5
• 9
• 13

What is the number of electrons?

• 4
• 5
• 9
• 13

What is the number of protons for this element?

• 6
• 12
• 18
• 24

What is the number of neutrons for this element?

• 6
• 12
• 18
• 18.011

What is the number of electrons for this element?

• 6
• 12
• 18
• 18.011

An atom has 6 protons and 7 neutrons.  What is its atomic mass?

• 1
• 6
• 7
• 13

Fill in the empty cell.

• Carbon
• 6
• 12
• 18

Fill in the empty cell.

• Lithium
• 3
• 4
• 7

Fill in the empty cell.

• 1
• 4
• 5
• 9