Electron Configuration & Quantum Mechanics

Two electrons orbiting an atom form a pair. If one of them has a spin of +1/2, what is the spin of the other electron?

• 0

• +1/2

• -1/2

• There is no way to know

Which of the following is NOT a quantum number?

• Magnetic quantum number

• Spin

• Mass

• There is no way to know

Which atom matches this electron configuration? 1s2 2s2 2p6 3s2

• Neon

• Magnesium

• Aluminum

• Potassium

Which atom matches this electron configuration? 1s2 2s2 2p6 3s2 3p6 4s2 3d10

• Zinc

• Copper

• Nickel

• Germanium

How many electrons does Silicon contain?

• 14

• 28

• 2

• 4

How many valence electrons does Si contain?

• 14
• 28
• 2
• 4

How many electrons can the first energy level (n = 1) hold?

• 1
• 2
• 8
• 0

At most, how many electrons can an orbital hold?

• 1 electron

• 2 electrons

• 3 electrons

• 4 electrons

How many valence electrons are represented here?

• 2
• 5
• 7
• 8

How many orbitals are in the 4d sublevel?

• 2
• 3
• 5
• 6