Calculating Neutrons

How many neutrons are in Magnesium?

• 36

• 12

• 24

• 6

Tags

NGSS.MS-PS1-1

How many neutrons are in Argon?

• 18

• 40

• 58

• 22

Tags

NGSS.MS-PS1-1

How many protons, neutrons, and electrons are in Oxygen?

• Protons = 8; Neutrons = 16; Electrons = 8

• Protons = 8; Neutrons = 8; Electrons = 8

• Protons = 16; Neutrons = 8; Electrons = 16

• Protons = 16; Neutrons = 24; Electrons = 16

Tags

NGSS.MS-PS1-1

What is the correct formula for calculating how many neutrons are in an atom?

• Protons + Electrons= Neutrons

• Atomic mass - Atomic number= Neutrons

• Atomic mass + Atomic number = Neutrons

• Atomic mass - Protons = Neutrons

Tags

NGSS.MS-PS1-1

An atom of a certain number has 36 protons, 36 electrons, and a mass number of 84. How many neutrons does it have?

• 36

• 48

• 72

• 84

Tags

NGSS.MS-PS1-1

Calculate the number of neutrons each isotope contains: Boron -11

• 5

• 6

• 11

• none of these

Tags

NGSS.MS-PS1-1

Use the diagram to answer the following question.

• 32

• 17

• 48

• 16

Calculate the number of protons, neutrons, and electrons in an isotope of nitrogen with a mass number of 15.

• 7 protons, 8 neutrons, 7 electrons

• 7 protons, 7 neutrons, 8 electrons

• 8 protons, 7 neutrons, 7 electrons

• 7 protons, 8 neutrons, 8 electrons

Answer explanation

Nitrogen has an atomic number of 7, meaning it has 7 protons and 7 electrons. The mass number is 15, so the number of neutrons is 15 - 7 = 8. Thus, the correct choice is 7 protons, 8 neutrons, 7 electrons.

Tags

DOK Level 3: Strategic Thinking

How many neutrons does the isotope of lithium have?

• 8

• 3

• 4

• 5

Tags

NGSS.MS-PS1-1

A common isotope of Carbon has an atomic number of 6 and a mass number of 13. How many neutrons are in

an atom of this isotope?

• 6

• 7

• 12

• 13

Tags

NGSS.MS-PS1-1