Electronic configuration

Which are the four atomic orbitals?

Within an energy level, which orbitals are the lowest in energy?

• s

• f

• d

• p

What is the Aufbau principle?

• Within an energy level, s orbitals are the lowest energy, followed by p, d and then f. F orbitals are the highest energy for that level.

• The lower the principal quantum number (n) the lower the energy.

• All three.

• The Aufbau Principle states that electrons enter the lowest energy orbitals first.

2^nd energy level contain 2 sublevel. Name the sublevel and max number of electron in each sublevel.

• 1s with 1 electron and 1p with 3 electrons
• 2s with 1 electron and 2p with 3 electrons
• 1s with 1 electron and 1p with 6 electrons
• 2s with 2 electrons and 2p with 6 electrons

What is the maximum numbers of electrons when n=2, l=0

An orbital can at most hold how many electrons?

• 1 electron
• 2 electrons
• 3 electrons
• 4 electrons

Identify the rule that is being violated

• Aufbau's principle

• Hund's rule

• Pauli Exclusion principle

• Heisenberg uncertainty principle

What is incorrect about this orbital diagram?

• Both arrows in the filled 2p box should be pointing the same direction

• There is nothing incorrect with this diagram

• In the there should only be 1 arrow in the first 2p box and one in the 2nd 2p box

• All the arrows should be pointing the same direction.

The electron configuration of an atom is 1s²2s²2p². The number of valence electrons in the atom is

What electron configuration matches an oxygen ion? (Z=8)

• 1s²2s²2p⁶3s2, 3p⁶4s²3d¹⁰4p⁵

• 1s²2s²2p⁴

• 1s²2s²2p⁶

• 1s²2s²2p⁶3s²3p⁶4s²3d¹