Chem 1st Half

Front

Wave-Mechanical Model: Electron cloud.

Back

The Wave-Mechanical Model describes a small, dense, positively charged nucleus surrounded by electrons moving in an 'electron cloud.'

Front

Charges of subatomic particles.

Back

Protons have a positive charge, neutrons have no charge, and electrons have a negative charge.

Front

Ground state of electrons.

Back

When all electrons are at their lowest possible energy, it is called the 'ground state.'

Front

Electron energy levels and orbitals.

Back

Electrons fill in energy levels and orbitals starting with the one that requires the least energy (1s) and move to those requiring more energy.

Front

Instrument used to see the bright line spectrum.

Back

Spectroscope

Front

Isotopes definition.

Back

Atoms with equal numbers of protons but different numbers of neutrons.

Front

Average atomic mass of an element.

Back

Weighted average of its naturally occurring isotopes.

Front

Most stable isotopes have what ratio of protons to neutrons?

Back

1:1 ratio

Front

Elements with atomic number higher than 83.

Back

Radioactive

Front

Transmutation can occur in two ways.

Back

Naturally or artificially.