Neutrons

An isotope of an element has 47 protons and 61 neutrons. What is the mass number of this isotope?

• 61

• 108

• 47

• 108

Answer explanation

The mass number of an isotope is the sum of its protons and neutrons. Here, there are 47 protons and 61 neutrons. Therefore, the mass number is 47 + 61 = 108, making the correct answer 108.

Tags

DOK Level 3: Strategic Thinking

How many neutrons are in magnesium?

• 12

• 24

• 25

• 36

Tags

NGSS.MS-PS1-1

How do you find the number of neutrons in an atom?

• It's the same as the atomic #

• It's the same as the mass number

• Subtract the atomic # from the mass number

• Add the mass number and the atomic #

A neutron has what charge?

• Positive

• Negative

• It has no charge (it is neutral)

How many neutrons does lithium have?

• 3

• 4

• 6

• 7

Tags

NGSS.MS-PS1-1

Which particle is NEUTRAL - NO CHARGE?

• Proton

• Neutron

• Electron

• Cell

How many NEUTRONS (bottom number - top) does Nitrogen- N have?

• 6

• 7

• 8

• 9

How many NEUTRONS (bottom - top) does Magnesium- Mg have?

• 10

• 11

• 12

• 13

Which TWO particles are found housed in the nucleus of the atom?

• Protons and Electrons

• Protons and Neutrons

• Electrons and Neutrons

• Protons, Neutrons, and Electrons

What is the formula to solve for the neutron?

• Mass + Atomic Number= Neutrons

• Mass x Atomic Number = Neutrons

• Mass - Atomic Number = Neutrons

• Mass + Number of Protons = Neutron

Tags

NGSS.MS-PS1-1