Unit 2 Chemistry Review

What is the charge of the nucleus in an atom of oxygen-17?

• 0

• -2

• +8

• +17

A neutral atom contains 12 neutrons and 11 electrons. The number of protons in this atom is

• 1

• 11

• 12

• 23

What is the total number of protons contained in the nucleus of a carbon-14 atom?

• 6

• 8

• 12

• 14

What is the total number of neutrons in the nucleus of a neutral atom that has 19 electrons and a mass number of 39?

• 19

• 20

• 39

• 58

What is the mass number of an atom that has six protons, six electrons, and eight neutrons?

• 6

• 12

• 14

• 20

The mass of a calcium atom is due primarily to the mass of its

• protons, only

• neutrons, only

• protons and neutrons

• protons and electrons

The nucleus of an atom of cobalt-58 contains

• 27 protons and 31 neutrons

• 27 protons and 32 neutrons

• 59 protons and 60 neutrons

• 60 protons and 60 neutrons

All the isotopes of a given atom have

• the same mass number and the same atomic number

• the same mass number but different atomic numbers

• different mass numbers but the same atomic number

• different mass numbers and different atomic numbers

Which diagram represents the nucleus of an atom of 27A1?13

• A

• B

• C

• D

Which two nuclides are isotopes of the same element?

• Na and Ne

• 39K and Ca19

• 39K and 13K

• Cand N