Quiz 2: Isotopes

1. Isotopes differ in __________, not atomic number

Volume

Mass

Density

2. Atoms that have the same number of protons and a different number of neutrons are called:

Fat atoms

Electrons

Ions

Isotopes

3. The mass number of an atom can be approximated by calculating the sum of:

The electrons and protons

The protons and neutrons

The neutrons and electrons

4. How many neutrons are in potassium-40?

19

40

21

37

5. How many protons are in potassium-40?

18

19

40

21

6. Which of the following is not an isotope of Carbon?

Carbon-9

An atom with 6 protons and 7 neutrons

An atom with 7 protons and 6 neutrons

Carbon-23

7. If what isotope of chlorine has 24 neutrons?

Chlorine-17

Chlorine-24

Chlorine-7

Chlorine-41

8. How many protons are in Si-52?

52

40

12

9. Given the natural abundance of the isotopes of carbon, which are Carbon-12, Carbon-13 and Carbon-14, what is the relative atomic mass of naturally occurring carbon?

13.0107

12

13

12.0107

10. The following rule:mass isotope1(%) + mass isotope2(%) + … mass isotopeX(%) 100 100 100is used to calculate...

Atomic mass

Isotope abundance

Relative atomic mass

Isotope number