Atoms and Isotopes Review

Atomic mass - atomic number = ?

• electrons

• valence electrons

• protons

• neutrons

The atom shown has __________ valence electrons.

Tags

NGSS.MS-PS1-1

Which subatomic particle has a positive charge?

• electrons

• neutrons

• protons

What subatomic particle makes every atom unique?

• neutrons

• protons

• electrons

Different isotopes have...

• different masses

• different protons

• different electrons

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

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

The third level (shell) of an atom can hold up to _________ electrons.

The 4th level (shell) of an atom can hold up to __________ electrons.