Chemistry A New Approach to the Atom 4-4: Review and Reinforcement

Orbital

A region in space where a particular energy is likely to be found

Quantum mechanical model

Explains some properties of atoms by treating the electron as a wave and quantizing its energy

Quantum Number

Number designating a principal energy level in an atom

Pauli exclusion principal

States that each orbital in an atom can hold at most two electrons and that these electrons must have opposite spins

Electron Spin

The clockwise or counterclockwise motion of an electron.

Electron Density

The density of an electron cloud

Principal Energy Levels

The main energy levels in an atom

The first principal energy level of the hydrogen atom contains only an

a.) S ORBITAL b.) p orbital c.) d orbital d.) f orbital

The number of sublevels in each principal energy level equals the

a.) mass of the atom b.) electron density of the atom c.) QUANTUM NUMBER FOR THAT ENERGY LEVEL d.) number of electrons in the atom

Which sub levels can be found in the fourth principal energy level of an atom

a.) s and p b.) s, p, and d c.) s, p,d, and f d.) s, p, d, f, and g

The 3s orbitals are different from the 2s orbitals in that it is

a.) smaller b.) LARGER c.) a different shape d.) more crowded

All p orbitals are shaped like

a.) spheres b.) doughnuts c.) DUMBBELLS d.) footballs

The electron cloud is lease dense where the probability of finding an electron

a.)greatest b.) LOWEST c.) highly likely d.) nonexistent