Atomic Mass # / Atomic # / # of Subatomic Particles


1) What is the atomic mass and the atomic mass number of the following elements?

ELEMENT

ATOMIC NUMBER (Z)

ATOMIC MASS NUMBER (A)

Oxygen

Nitrogen

Carbon

Calcium

2) What do you notice about the atomic number compared to the atomic mass number?

3) How many protons, neutrons, and electrons are present in the following?

SUBSTANCE

TYPE: Element, Ion, Isotope, combo (Ion/Iso)

PROTONS

NEUTRONS

ELECTRONS

Lead

Copper

Oxygen

Americium

Vanadium with mass number 57

Tellurium with mass number135

Al3+

O2-

Ba2+ with a mass number of 146

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