Chem-70% Review- Atomic structure/ AAM/ Ion/ Moles

Front

What subatomic particle determines the identity of an element?

Back

Proton

Front

What are ions?

Back

Atoms with a positive or negative charge.

Front

Which particle has no charge?

Back

Neutron

Front

What is the mass of 4.98 x 10^24 atoms of Zn?

Back

541 g

Front

What is the charge of a proton?

Back

Positive charge.

Front

What is the charge of an electron?

Back

Negative charge.

Front

What is the charge of a neutron?

Back

No charge.

Front

Define atomic mass unit (amu).

Back

A unit of mass used to express atomic and molecular weights, defined as one twelfth of the mass of a carbon-12 atom.

Front

What is Avogadro's number?

Back

6.022 x 10^23, the number of atoms or molecules in one mole of a substance.

Front

How do you calculate the number of moles from mass?

Back

Number of moles = mass (g) / molar mass (g/mol).