Unit 2 Test Review (Atomic Structure)

Sodium has 11 protons, which means

• its atomic number is also 11

• its mass number is also 11

• it has 11 neutrons

• it has 23 electrons

What element is this?

• Argon

• Chlorine

• Iron

• Nitrogen

What is the mass number of this element?

• 17

• 18

• 35

• 7

Which of the following is true about nitrogen-14 and nitrogen-15?

• The have the same mass number.

• They have the same amount of protons.

• They have the same amount of neutrons

• They are ions.

Determine the number of the following:

Protons​ = ​ (a)  

Neutrons = ​ ​ (b)   ​

Electrons = ​ (c)  

• 6
• 8
• 14
• 20

The subatomic particle with a negative charge

• Proton

• Neutron

• Electron

If an atom has 6 protons, 8 neutrons, and 6 electrons, what is its overall charge?

• 0

• +2

• -2

• +6

Which atom will have a +1 charge?

• 3 protons

  4 neutrons

  3 electrons

• 3 protons

  4 neutrons

  4 electrons

• 3 protons

  4 neutrons

  2 electrons

• 3 protons

  3 neutrons

  3 electrons

Positively charge subatomic particle

• Proton

• Neutron

• Electron

• Cloud

Select the correct number of electrons.

• 8

• 6

• 10

• 16