How many maximum electrons can exist in the fourth energy level of any atom?

• 64 electrons

• 32 electrons

• 16 electrons

• 4 electrons

Which sublevels are in the second energy level of an atom?

• p and d

• s and d

• p and f

• s and p

How many orbitals are in the third energy level of an atom?

• 18

• 4

• 9

• 36

Which quantum number identifies the energy level of the electron in an atom?

• Principle Quantum Number

• Angular Momentum Quantum Number

• Magnetic Quantum Number

• Spin Quantum Number

Which guideline for writing electron configurations states that electrons will enter an atom at the lowest possible energy level?

• Pauli's Exclusion Principle

• Hund's Rule

• Aufbau Principle

• The "Bus" Rule

Two electrons in the same orbital must _____________.

• spin in the same direction

• spin oppositely of each other

• share the same set of 4 quantum numbers

What element is represented by the following electron configuration: 1s2 2s2 2p6 3s2?

• Magnesium (Mg)

• Sodium (Na)

• Beryllium (Be)

• Aluminum (Al)

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Think about the orbital notation diagram for sulfur (S). How many unpaired valence electrons are there in a neutral atom of sulfur?

• 4

• 3

• 2

• 1

Tags

NGSS.HS-PS1-1

What Noble Gas would be used in the shorthand notation for chlorine (Cl)?

• Argon (Ar)

• Neon (Ne)

• Sulfur (S)

• Magnesium (Mg)

Tags

NGSS.HS-PS1-1

How many valence electrons are in a neutral atom of aluminum (Al)?

• 13

• 3

• 1

• 2

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2