Neutrons

A neutron has what charge? (a)  

• Positive

• Negative

• It has no charge (it is neutral)

Which particles are found in the nucleus of an atom?

• protons only

• neutrons only

• protons & electrons

• protons & neutrons

What subatomic particles are coloured red in this image?

• protons

• neutrons

• electrons

Tags

NGSS.MS-PS1-1

What two subatomic particles have approximately the same mass?

• electrons & neutrons

• protons & electrons

• neutrons & protons

Which subatomic particle is found in the nucleus of an atom along with protons?

• Electron

• Neutrino

• Neutron

• Positron

Which statement correctly describes the location and charge of the neutrons in an atom?

• The neutrons are inside the nucleus and have a positive charge.

• The neutrons are outside the nucleus and have a neutral charge.

• The neutrons are outside the nucleus and have a negative charge.

• The neutrons are inside the nucleus and have a neutral charge.

How many neutrons are in an atom of carbon-12?

• 6

• 12

• 8

• 14

Tags

DOK Level 1: Recall

How many neutrons does the isotope of lithium have?

• 8

• 3

• 4

• 5

Tags

NGSS.MS-PS1-1

Calculate the number of protons, neutrons, and electrons in an isotope of oxygen with a mass number of 17.

• 8 protons, 9 neutrons, 8 electrons

• 8 protons, 8 neutrons, 9 electrons

• 9 protons, 8 neutrons, 8 electrons

• 8 protons, 9 neutrons, 9 electrons

Answer explanation

Oxygen has 8 protons (atomic number 8). For the isotope with a mass number of 17, the number of neutrons is 17 - 8 = 9. Since it's neutral, it has 8 electrons. Thus, the correct choice is 8 protons, 9 neutrons, 8 electrons.

Tags

DOK Level 3: Strategic Thinking

If an atom has an atomic number of 8 and a mass number of 18, how many neutrons does it have?

• 8

• 10

• 18

• 26

Answer explanation

To find the number of neutrons, subtract the atomic number from the mass number. Here, mass number (18) - atomic number (8) = 10 neutrons. Thus, the correct answer is 10.

Tags

DOK Level 3: Strategic Thinking