Electron Configuration Practice

How do you determine the number of valence electrons in an atom?

• By looking at the outermost shell's electron configuration.

• By counting all the electrons in the atom.

• By calculating the atomic mass of the element.

• By identifying the number of protons in the nucleus.

What atom matches the electron configuration 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰?

• Zinc

• Copper

• Iron

• Silver

What is the maximum number of electrons that can be placed in the p subshell?

• 2

• 4

• 6

• 8

Define electron configuration.

• The arrangement of protons in an atom.

• The distribution of electrons in an atom's orbitals.

• The total number of neutrons in an atom.

• The energy levels of an atom's nucleus.

What is Hund's Rule?

• Electrons will fill degenerate orbitals singly before pairing up.

• Electrons will pair up in the same orbital before filling others.

• Electrons will occupy the lowest energy orbitals first regardless of pairing.

• Electrons will fill all orbitals in pairs before occupying any singly.

What is the electronic configuration of sodium?

• 1s² 2s² 2p⁶ 3s¹

• 1s² 2s² 2p⁶ 3p¹

• 1s² 2s² 2p⁶ 3s²

• [Ne] 3s¹

Which electron configuration corresponds to Chlorine (Cl)?

• 1s² 2s² 2p⁶ 3s² 3p⁴

• 1s² 2s² 2p⁶ 3s² 3p⁵

• 1s² 2s² 2p⁶ 3s² 3p⁶

• 1s² 2s² 2p⁶ 3s² 3p³

What is the significance of the noble gas configuration?

• It represents a stable electron arrangement.

• It indicates a high reactivity of the element.

• It shows the element's ability to form ionic bonds.

• It determines the element's position in the periodic table.

What is the electron configuration for a neutral atom of Carbon?

• 1s² 2s² 2p²

• 1s² 2s² 2p⁶

• 1s² 2s² 2p¹

• 1s² 2s² 2p³

What does the Pauli Exclusion Principle state?

• No two electrons in an atom can have the same set of four quantum numbers.

• Electrons can occupy the same quantum state if they have opposite spins.

• Electrons in the same orbital must have the same spin.

• The energy levels of electrons are quantized and discrete.