Question 1

Isotopes

Accepted Answer

Different forms of an element: same number of protons, but different number of neutrons.

Answer

Different forms of an element: same number of protons, but different number of electrons.

Answer

Different forms of an element: same number of neutrons, but different number of protons.

Question 2

Atomic number

Accepted Answer

the number of protons in an atom's nucleus

Answer

the number of neutrons and protons in an atom

Answer

the number of electrons in an atom

Question 3

Atomic mass

Accepted Answer

The sum of the protons and neutrons in an atom

Answer

The sum of the protons and electrons in an atom

Answer

The sum of neutrons and electrons.

Question 4

Carbon-13 has how many neutrons?

Accepted Answer

7

Answer

6

Answer

13

Question 5

Is Carbon-13 an isotope?

Accepted Answer

Yes

Answer

No

Question 6

Oxygen-18 has how many neutrons?

Accepted Answer

10

Answer

8

Answer

9

Question 7

Is Oxygen-18 an isotope?

Accepted Answer

Yes

Answer

No

Question 8

Carbon 12 is an isotope.

Accepted Answer

False

Answer

True

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