grade 9 atomic theory

Structures 1, 2 and 3 represent which subatomic particles of an atom?

• proton, neutron, electron respectively

• neutron, proton, electron respectively

• electron, proton, neutron respectively

• proton, electron, neutron respectively

Tags

NGSS.MS-PS1-1

Which subatomic particle(s) are located in the nucleus of an atom?

• electron and proton

• electron and neutron

• proton and neutron

• proton only

Which option in the table correctly describes the charges of subatomic particles.

• A

• B

• C

• D

Tags

NGSS.MS-PS2-3

If an atom has 35 protons in the nucleus, how many electrons will it have?

• 34

• 35

• 36

• 70

Tags

NGSS.MS-PS1-1

What is the atomic number of the atom shown in the diagram?

• 5

• 6

• 11

• 16

Tags

NGSS.MS-PS1-1

What is the atomic mass/mass number of the atom shown in the diagram?

• 5

• 6

• 11

• 16

Tags

NGSS.MS-PS1-1

Lithium has an atomic number of 3 and a mass number of 7. How many electrons are there in a lithium atom?

• 3

• 4

• 7

• 10

Tags

NGSS.MS-PS1-1

Lithium has an atomic number of 3 and a mass number of 7. How many neutrons are there in a lithium atom?

• 3

• 4

• 7

• 10

How many protons are in the nucleus of an atom with an atomic number of 15 and an atomic mass of 31.

• 15

• 16

• 31

• 46

Fluorine has 9 protons, 10 neutrons and 9 electrons. What is the atomic mass/mass number of a fluorine atom?

• 9

• 18

• 19

• 28

Tags

NGSS.MS-PS1-1