What is the electron configuration of an atom?

• It is the way in which the electrons revolve around the nucleus.

• It is the number of protons and neutrons in the nucleus

• None of the above

According to Bohr's atomic theory, electrons

• revolve in different energy levels or SHELLS

• revolve in a unique energy level around the nucleus

• None of the above

Energy levels, or shells, are represented as

• n= 1, 2, 3, 4, 5, 6, 7

• l= s, p, d, f

• ml = +1/2, -1/2

According to the picture, we can say

• 4s orbital should be filled with e^- before a 3d orbital

• 3s orbital should be filled with e^- before a 2p orbital

• 5s orbital should be filled with e^- before a 4p orbital

 $2p^4$  means

• There are 4 electrons, in a subshell p, in the 2nd shell

• There are 2 electrons, in a subshell p, in the 4th shell

• None of the above

Subshells are represented as

• l= s, p, d, f

• n= 1, 2, 3, 4, 5, 6, 7

• none of the above

The d subshell can hold a maximum of

• 6 e^-

• 10 e^-

• 14 e^-

The f subshell can hold a maximum of

• 6 e^-

• 10 e^-

• 14 e^-

The p subshell can hold a maximum of

• 6 e^-

• 14 e^-

• 10 e^-

The s subshell can hold a maximum of

• 10 e^-

• 14 e^-

• 2 e^-