Atomic Mass and Atomic Number

Atomic Mass and Atomic Number

8th Grade

8 Qs

quiz-placeholder

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Atomic Mass and Atomic Number

Atomic Mass and Atomic Number

Assessment

Quiz

Chemistry, Science

8th Grade

Hard

Created by

Vest Micu

Used 128+ times

FREE Resource

8 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If the atomic mass is the number of protons and neutrons, and the atomic number is the number of protons, how

can the number of electrons be determined?

By subtracting the number of protons by the number of neutrons.

It is the same as the number of protons.

By subtracting the number of protons from the atomic mass.

By adding the protons and neutrons.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If the atomic number of Pb (Lead) is 82 and its atomic mass is 205, how many neutrons does it have?

123

82

205

287

3.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Hydrogen has an atomic mass of 3 and atomic number of 1. How many protons and neutrons does hydrogen have?

3 protons and 1 neutron

1 proton and 2 neutrons

2 protons and 1 neutron

1 proton and 3 neutrons

4.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Media Image

Which element is the heaviest?

Na

Ar

Ca

O

5.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Media Image

Which atom has an atomic mass of 16?

Na

Ar

Ca

O

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

An atom has an atomic number of 11 and an atomic mass of 23. Which of the following statements is correct?

It has 11 protons and 11 neutrons.

It has 11 electrons and 12 protons.

It has 11 protons and 11 electrons.

It has 23 protons and 11 electrons.

7.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Which of the following atoms has the greatest number of neutrons?

Media Image
Media Image
Media Image
Media Image

8.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Which pair of particles contributes the most to the overall mass of the atom?

Electrons and protons

Protons and neutrons

Electrons and neutrons