Electron Distribution in an Atom

How many sublevels are in energy level (n=1)?

• 1

• 2

• 3

• 4

How many orbitals are in the second energy level (n=2)?

• 1

• 3

• 4

• 5

What is the maximum number of electrons can occupy in the third energy level (n=3)?

• 8

• 10

• 18

• 32

What type of sublevel has the this shape?

• s

• p

• d

• f

What is the correct electron configuration of silicon?

• 1s² 2s² 2p⁶ 3p⁴

• 1s² 2s² 3p⁶ 4s² 3d²

• 1s² 2s² 2p⁶ 3s² 3p²

• 1s² 2s² 3p⁶ 3s² 4p²

What orbital does the last entering electron of chlorine belong?

• 2s²

• 2p⁵

• 3p⁵

• 4d⁵

What is the correct set of quantum numbers for the last entering electron of magnesium?

• n=2 l=0 ml=0 ms=-1/2

• n=3 l=0 ml=0 ms=-1/2

• n=3 l=1 ml=-1 ms=+1/2

• n=3 l=0 ml=0 ms=+1/2

What element has this orbital diagram?

• N

• F

• Cl

• P

Carbon has atomic number of 6. At what orbital does its last entering electron occupy?

• 2s²

• 2d⁶

• 2p⁶

• 2p²

How many electrons are there in the outermost energy level of sodium?

• 1

• 3

• 5

• 8