Unit 4: Quantum Theory

How many quantum numbers are needed to completely describe the properties of an electron in an atom?

• 1

• 2

• 3

• 4

A spherical electron cloud surrounding an atomic nucleus would best represent a

• s orbital

• p orbital

• d orbital

• f orbital

The p orbitals are shaped like

• electrons

• circles

• petals

• sphere

The maximum number of electrons that can occupy one orientation is

• 18

• 8

• 2

• 32

The electron configuration for an element is 1s2 2s2 2p3. The element is

• Oxygen

• Nitrogen

• Iron

• Carbon

Tags

NGSS.HS-PS1-1

The electrons located in the highest occupied energy level are called

• high level electrons

• quantum electrons

• fast electrons

• valence electrons

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

The letter designations for the first four sublevels with the number of electrons that can be accommodated in each sublevel are

• s:1, p:3, d:10, and f:14.

• s:1, p:3, d:5, and f:7.

• s:2, p:6, d:10, and f:14.

• s:1, p:2, d:3, and f:4.

Tags

NGSS.HS-PS1-1

How many orientations can an s orbital have about the nucleus?

• 1

• 2

• 3

• 5

How many electrons can occupy the s orbitals at each energy level?

• two, if they have opposite spins

• two, if they have the same spin

• one

• no more than eight

If n is the principal quantum number of a main energy level, the number of electrons in that energy level is

• n

• 2n

• n2

• 2n2