Atoms and Isotopes

When two atoms of the same element have different masses, they are called ______, and have a different number of ______.

• Neutrons; Isotopes

• Atoms; Isotopes

• Isotopes; Protons

• Isotopes; Neutrons

Isotopes are atoms that have different

• Mass numbers

• Element names

• Atomic Numbers

Which part of an atom has the smallest mass?

• Proton

• Neutron

• Electron

• They are all the same

Which part of an atom has a positive charge?

• Proton

• Neutron

• Electron

• None of them

What are atoms with the same number of protons but different numbers of neutrons?

• electrons

• protons

• neutrons

• isotopes

If an additional neutron is added to the Boron atom, select all of the charges that will occur.

• an isotope is created

• an ion is created

• the atom becomes an ion

• the mass increases

Tags

NGSS.MS-PS1-1

What do you call an atom that has extra neutrons in the nucleus?

• An ion

• An isotope

• An atom

• A molecule

When an atom had 10 protons and 12 neutrons, this atom can be called an isotope.

• True

• False

Tags

NGSS.MS-PS1-1

What is the charge of an ion with 11 protons and 10 electrons?

• +1

• -1

• 0

• +2

An atom has an atomic number of 19 and a mass number of 29. How many neutrons are in the atom?

• 30

• 19

• 10

• 38

Tags

NGSS.MS-PS1-1