Ch. 4 Test

The basic unit of a chemical element.

• Proton

• Electron

• Atom

• Neutron

The number of protons and neutrons in an atom.

• Atomic number

• Atomic mass

• Mass number

• Atomic symbol

The positive subatomic particle found in the nucleus of an atom.

• Proton

• Electron

• Atom

• Neutron

The negatively charged particle found in the shell of an atom.

• Proton

• Electron

• Atom

• Neutron

Which subatomic particle is the smallest?

• Proton

• Electron

• Neutron

• They’re all the same size

What are the symbols and charges for each subatomic particle?

• Proton: p+, Neutron: n0, Electron: e-

• Proton: p-, Neutron: n+, Electron: e0

• Proton: p0, Neutron: n-, Electron: e+

Write the hyphen notation for the following isotopes (2 pts each): a. Mass number of 22 and atomic number of 11

• Sodium-22

• Neon-22

• Magnesium-22

• Aluminum-22

Which isotope has 4 neutrons?