Understanding Isotopes and Atomic Mass

What is meant by the term isotopes?

• Atoms of the same element with the same number of neutrons but different numbers of protons.

• Atoms of the same element with the same number of protons but different numbers of neutrons.

• Atoms of different elements with the same number of protons.

• Atoms of different elements with different numbers of neutrons.

• 17

• 18

• 19

• 20

• 17

• 18

• 19

• 20

• 35.0

• 35.5

• 36.0

• 36.5

Which of the following statements is true about isotopes of the same element?

• They have different electronic configurations.

• They have different chemical properties.

• They have the same number of protons.

• They have different numbers of electrons.

What is the standard used for measuring the masses of all atoms?

• Hydrogen-1

• Oxygen-16

• Carbon-12

• Nitrogen-14

• 25

• 50

• 75

• 100

• 25

• 50

• 75

• 100

What is the electronic configuration of chlorine?

• 2, 8, 6

• 2, 8, 7

• 2, 8, 8

• 2, 7, 8

• 32.0

• 32.1

• 32.2

• 32.3