Question 1

The particles in the atom are protons, neutrons, and ...

Accepted Answer

electrons

Answer

cations

Answer

positrons

Answer

ions

Question 2

Isotopes are elements of the same atom that have....

Accepted Answer

different masses

Answer

the same mass

Answer

different numbers of electrons

Answer

different numbers of protons

Question 3

Atomic number is the number of _______________ in an atom

Accepted Answer

protons

Answer

neutrons

Answer

particles

Answer

electrons

Question 4

Mass number is the number of ______________________ in an atom

Accepted Answer

protons + neutrons

Answer

neutrons

Answer

protons + electrons

Answer

protons

Question 5

What is the mass number for an oxygen atom with 9 neutrons?

Accepted Answer

17

Answer

8

Answer

16

Answer

15

Question 6

How many protons does a neon atom have?

Accepted Answer

10

Answer

20

Answer

21

Answer

11

Question 7

How many electrons does a neutral Neon atom have?

Accepted Answer

10

Answer

20

Answer

21

Answer

11

Question 8

What is the average atomic mass of oxygen (from the periodic table)?

Accepted Answer

15.99 amu

Answer

8 amu

Answer

6 amu

Answer

18.99 amu

Question 9

There are two naturally occurring isotopes of Gallium. Which is the most abundant? (use your periodic table!)

Accepted Answer

Gallium- 70

Answer

Gallium- 68

Answer

Gallium- 32

Answer

Gallium- 72

Question 10

How many protons does a potassium atom have?

Accepted Answer

19

Answer

31

Answer

15

Answer

39

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