Elements and Isotopes

What particles are located in the nucleus?

• electron

• protons

• electrons and neutrons

• protons and neutrons

Which particles orbit around the nucleus?

• electrons

• protons

• neutrons

• atoms

How many protons do these lithium isotopes have?

• 7

• 6

• 8

• 3

Tags

NGSS.MS-PS1-1

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

• Atomic # - Mass #

• Mass # - Atomic #

• Mass # + Atomic #

• Mass # / Atomic #

In a ________________atom, the nucleus has the potential to break down, or decay, and change into a different element

• Stable

• Nuclear

• Radioactive

Tags

NGSS.HS-PS1-8

The element notation for a helium atom is shown. What is the mass number?

• 4

• 2

• 6

• 0

Tags

NGSS.MS-PS1-1

How many neutrons are in this carbon atom?

• 14

• 6

• 20

• 8

Tags

NGSS.MS-PS1-1

If oxygen has 8 protons, how many electrons would it have to be a neutral atom? Explain your answer.

Tags

NGSS.MS-PS1-1

What particle determines the element?

• Neutrons

• electrons

• protons

Atoms of the same element with different numbers of neutrons are called