What atom matches this electron configuration?
1s²2s²2p⁶3s²3p⁶4s²3d¹⁰

• Zinc
• Copper
• Nickel
• Germanium

The electron configuration of an atom is 1s²2s²2p⁶.  The number of electrons in the atom is 

• 3
• 6
• 8
• 10

Which electron configuration belongs to Chlorine (Cl)?

• 1s² 2s² 2p⁶ 3s² 3p⁵
• 1s² 2s² 2p⁶ 3s² 3p⁶
• 1s² 2s² 2p⁶ 3s² 3p⁷

How many electrons can the d sublevel hold?

• 14
• 10
• 2
• 6

How many electrons can the s sublevel hold?

• 14
• 10
• 2
• 6

What atom matches this electron configuration?
1s²2s²2p⁶3s²

• Neon
• Magnesium
• Aluminum
• Potassium

Each row on the periodic table represents:

• an energy level

• a sublevel

• an electron

• an orbital

Which area on the periodic table represents the electrons in the "d" sublevel?

• representative elements

• columns 3-8

• rare earth elements

• transition elements

Energy levels are denoted by:

• letters

• numbers

• a combination of letters and numbers

• subscripts

There are 4 different types of subshells (orbitals) s,p,d,f.

• true
• false