ACTIVITY 2:

What is Atomic Mass?

The mass is of 1 mole of atoms.

What is a dozen? A set of 12.

What is a case? 24

What is gross? 144 (12 dozen)

What is a mole? 6.022 x10^₂₃

How many planet earth's are needed to have a mole of people?
If there are 6, 000,000, 000 people on earth and one mole is 602, 000,000,000,000,000,000,000 by dividing the amout of people by 1 mole comse out to needing roughly 10 planets to accommidate 6 billion people.

6.02 x 10 (23)
____________ = 1 x 10 (14)

6 x 10 (9)

Sodium:

Daily Sodium (Na) intake 1,500 mg. - 23 grams of sodium atoms per 1 mole of sodium atoms.  = .06 moles of Na atoms x 6.02 x 10 (23)

Sodium atomic # = 11
atomic mass # = 23

Protrons = 11
Neutrons = 12
Electrons - 11 (electons match the protons so the charges balance)

What does the Sodium atom look like?