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