Chemistry Review #1

Which subatomic particle has a positive charge?

• Neutron

• Proton

• Electron

• None of the above

Where are neutrons located in an atom?

• • In the nucleus

• In the electron cloud

• Orbiting around the nucleus

• None of the above

Which subatomic particle has the smallest mass?

• Proton

• Neutron

• Electron

• All have the same mass

Determine the number of protons, neutrons, and electrons in Potassium (K) with an atomic number of 19 and atomic mass of 39.

• Protons: 19, Neutrons: 20, Electrons: 19

• Protons: 20, Neutrons: 19, Electrons: 20

• Protons: 18, Neutrons: 21, Electrons: 18

• Protons: 19, Neutrons: 19, Electrons: 20

Determine the number of protons, neutrons, and electrons in Nitrogen (N) with an atomic number of 7 and atomic mass of 14.

• Protons: 14

• Protons: 7

• Neutrons: 7

• Neutrons: 14

• Electrons: 7

Determine the number of protons, neutrons, and electrons in Platinum (Pt) with an atomic number of 78 and atomic mass of 195.

• Protons: 78, Neutrons: 117, Electrons: 78

• Protons: 79, Neutrons: 116, Electrons: 79

• Protons: 78, Neutrons: 116, Electrons: 77

• Protons: 77, Neutrons: 118, Electrons: 77

Determine the number of protons, neutrons, and electrons in Argon (Ar) with an atomic number of 18 and atomic mass of 40.

• Protons: 18, Neutrons: 22, Electrons: 18

• Protons: 20, Neutrons: 20, Electrons: 20

• Protons: 18, Neutrons: 20, Electrons: 18

• Protons: 19, Neutrons: 21, Electrons: 19

Determine the number of protons, neutrons, and electrons in Helium (He) with an atomic number of 2 and atomic mass of 4.

• Protons: 2, Neutrons: 2, Electrons: 2

• Protons: 2, Neutrons: 1, Electrons: 2

• Protons: 1, Neutrons: 2, Electrons: 2

• Protons: 2, Neutrons: 2, Electrons: 1

Use the periodic table.

Determine the name of the element that has:

Atomic Number = 17 Atomic Mass = 32.453, Protons = 17

What is the element?

• Chlorine

• Oxygen

• Nitrogen

• Carbon

Use the periodic table.

Determine the name of the element that has:

Atomic Number = 25 Electrons = 25 Protons = 25

What is the element?

• Manganese

• Iron

• Nickel

• Copper