Atomic Structure and Mass

Atomic Structure and Mass

Assessment

Interactive Video

Chemistry

9th - 10th Grade

Practice Problem

Hard

Created by

Jennifer Brown

FREE Resource

10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are the three types of particles that make up an atom?

Protons, neutrons, and photons

Neutrons, electrons, and positrons

Protons, neutrons, and electrons

Electrons, photons, and quarks

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why can the mass of electrons be ignored when calculating the mass of an atom?

Because electrons are not found in the nucleus

Because electrons have a negligible mass compared to protons and neutrons

Because electrons have a negative charge

Because electrons are not part of the atom

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many protons does a hydrogen atom have?

Two

One

Zero

Three

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the total mass of a helium atom?

2

5

3

4

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many neutrons are present in a fluorine atom with an atomic number of 9 and a total mass of 19?

8

11

9

10

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the atomic number of scandium?

22

20

21

19

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many neutrons does scandium have if its atomic number is 21 and its relative atomic mass is 45?

22

25

23

24

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