Understanding Electron Configuration and Orbital Notation for Copper

What is the number of electrons in a stable copper atom?

• 28

• 29

• 30

• 31

Which energy levels are involved in the electron configuration of copper?

• 1s, 2s, 2p, 3s, 3p

• 2s, 2p, 3s, 3p, 4s

• 1s, 2s, 2p, 3s, 3p, 4s, 3d

• 1s, 2s, 3s, 3p, 4s, 4p

What is the correct electron configuration for copper considering the electron jump?

• 1s2 2s2 2p6 3s2 3p6 4s1 3d9

• 1s2 2s2 2p6 3s2 3p6 4s2 3d10

• 1s2 2s2 2p6 3s2 3p6 4s1 3d10

• 1s2 2s2 2p6 3s2 3p6 4s2 3d9

According to Hun's Rule, what must occur before electrons pair in orbitals?

• All orbitals must be filled with two electrons

• Each orbital must have one electron

• Electrons must pair in the s orbital first

• Electrons must pair in the d orbital first

What is a possible reason for the electron jump from 4s to 3d in copper?

• To achieve a higher energy state

• To stabilize the atom

• To fill the 4s orbital completely

• To create copper three