PS8 Matter Unit Test CORRECTIONS

The atomic number of an element equals the number of

• protons only.
• neutrons only.
• protons and neutrons combined.
• electrons only.

The atomic mass equals the number of

• protons only.
• neutrons only.
• protons and neutrons combined.
• electrons only.

How is the periodic table arranged?

• by increasing atomic number
• by atomic mass
• by the number of neutrons
• by state of matter

Which element is the MOST reactive?

• Fe
• Hs
• Cu
• Rg

Which element is the LEAST reactive?

• Fe
• Hs
• Cu
• Rg

Which element is the HEAVIEST?

• Fe
• Hs
• Cu
• Rg

Which pair has the most in common? (Cu and Au) OR (Rh and Pd)?

• Cu and Au
• Rh and Pd

Which pair has the most in common? (Fe and Rh) OR (Ir and Pt)?

• Fe and Rh
• Ir and Pt

Elements in the same group

• have the same number of protons.
• have the same atomic mass.
• have the same number of energy levels in the electron cloud.
• have the same number of valence electrons.

Elements in the same period

• have the same number of protons.
• have the same atomic mass.
• have the same number of energy levels in the electron cloud.
• have the same number of valence electrons.