Isotope symbols

An atom's atomic number is equal to

• The number of protons in the atom's nucleus

• The number of neutrons in the atom's nucleus

• The number of electrons in the atom

• The total of protons + neutrons

How can we identify an element from the numbers of protons, neutrons, and electrons?

• Guess

• Look on the Periodic Table using the number of protons + neutrons

• Look on the Periodic Table using the number of protons

• Look on the Periodic Table using the number of neutrons

An atom's mass number is equal to

• The number of protons in the atom's nucleus

• The number of neutrons in the atom's nucleus

• The number of electrons in the atom

• The total of protons + neutrons

What is the atomic number of the element shown?

• 3

• 4

• 7

• 10

What is the atomic number of the element shown?

• 0

• 22

• 10

• 12

How many protons are in the nucleus of the element shown?

• 19

• 9

• 10

• 28

How many protons are in the nucleus of the element shown?

• 4

• 9

• 13

• 5

What is the mass number of the element shown?

• 6

• 7

• 13

• 19

What is the mass number of the element shown?

• 15

• 7

• 8

• 0

How many protons are in the nucleus of the element shown?

• 9

• 4

• 5

• 13