2.2 Masses of Atoms Quiz

What is the difference between atomic number and atomic mass?

• Atomic number is the number of electrons in an atom, while atomic mass is the number of neutrons in an atom.

• Atomic number is the number of neutrons in an atom, while atomic mass is the number of protons in an atom.

• Atomic number is the number of protons in an atom, while atomic mass is the number of neutrons in an atom.

• Atomic number is the number of protons in an atom, while atomic mass is the weighted average mass of an element's isotopes.

What is the symbol for Boron?

• Na

• O

• C

• B

What is the average atomic mass of Oxygen?

• 22.99 amu

• 16 amu

• 12.01 amu

• 10.81 amu

How many neutrons does a Carbon atom with a mass number of 12 and an atomic number of 6 have?

• 12

• 4

• 6

• 8

What is the atomic number of Sodium?

• 8

• 11

• 6

• 5

What is the mass number of Copper?

• 12

• 23

• 11

• 16

How many protons does a Boron atom have?

• 5

• 6

• 11

• 8

What are isotopes?

• Atoms of the same element that have a different number of electrons.

• Atoms of the same element that have a different number of protons.

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

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