Atoms Quiz: Unit One

What is the smallest particle of an element that retains the properties of that element?

• molecule

• atom

• cell

• proton

What is the center of an atom called, where protons and neutrons are located?

• nucleus

• proton

• center

• electron

What is the number of protons in the nucleus of an atom called?

• Atomic number

• Nuclear number

• Proton count

• Atomic mass

What is the total number of protons and neutrons in the nucleus of an atom called?

• Mass number

• Atomic number

• Electron number

• Isotope number

What is the arrangement of electrons in an atom called?

• electron configuration

• atomic organization

• proton arrangement

• neutron configuration

What is the number of protons in an atom called?

• Proton number

• Atomic number

• Atomic mass

• Electron count

What is the average mass of an atom of an element called?

• Atomic weight

• Molecular mass

• Elemental mass

• Atomic mass

How many electrons can the first energy level of an atom hold?

• 0

• 2

• 10

• 5

How many electrons can the second energy level of an atom hold?

• 12

• 8

• 5

• 10

How many electrons can the third energy level of an atom hold?

• 18

• 7

• 25

• 10