Atoms

Atoms

10th Grade

99 Qs

quiz-placeholder

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Atoms

Atoms

Assessment

Quiz

Science

10th Grade

Hard

Created by

Jonathan Gois

Used 1+ times

FREE Resource

99 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

An atom of gallium has an atomic number of 31 and a mass number of 70. Give the number of electrons, protons and neutrons in the atom.

31 electrons, 31 protons, 39 neutrons

31 electrons, 31 protons, 40 neutrons

31 electrons, 32 protons, 39 neutrons

32 electrons, 31 protons, 39 neutrons

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is an element?

A substance that cannot be broken down into simpler substances

A mixture of two or more substances

A compound made of different atoms

A type of molecule

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Atoms can have different numbers of protons, neutrons, and electrons. What determines the type of atom?

The number of protons

The number of neutrons

The number of electrons

The number of protons and neutrons

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

An atom with one proton in its nucleus is:

hydrogen

helium

lithium

beryllium

5.

MULTIPLE SELECT QUESTION

30 sec • 1 pt

Which of the following is a correct symbol for an element?

C for carbon

O for oxygen

Mg for magnesium

All of the above

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A substance consists of atoms which all have the same number of protons and electrons but different numbers of neutrons. Explain why this substance is an element.

Because it has a unique atomic number.

Because it has isotopes.

Because it is a compound.

Because it has a unique atomic mass.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Calculate silicon's relative atomic mass to 1 decimal place.

28.1

28.0

28.2

28.3

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