ISOTOPES

Which of the following subatomic particles has the smallest mass?

• a. Electron

• b. Neutron

• c. Proton

• d. Nucleus

In which of the following quantities will two isotopes of an element have different

values?

• a. Atomic Number

• b. Mass Number

• c. Number of Protons

• d. Number of Electrons

What is the mass number of an atom which has 11 protons, 11 electrons, and 12

neutrons?

• a. 11

• b. 12

• c. 22

• d. 23

How many neutrons are in uranium-238?

• a. 146

• b. 92

• c. 238

• d. 64

How many protons are in mercury-204?

• a. 204

• b. 80

• c. 124

• d. 62

These are atoms of an element having the same atomic number but different mass number.

• a. Isotopes

• b. Mass Number

• c. Proton

• d. Neutron

It is the total number of protons and neutrons in a nucleus.

• a. Isotopes

• b. Mass Number

• c. Electron

• d. Neutron

It is the number of protons found in the nucleus of every atom of that element.

• a. Isotopes

• b. Mass Number

• c. Atomic Number

• d. Proton

It is a molecule with a net electric charge due to the loss or gain of one or more electrons.

• a. Isotopes

• b. Ion

• c. Mass Number

• d. Atomic Number

It is used in research in red blood cell survival studies.

• a. Carbon-14

• b. Chromium-51

• c. Cobalt-60

• Copper-67