Unit #6 & 7 quiz review

Which of the following is the least reactive element

• A

• B

• C

• D

• E

Which of the following is an excited element?

• A

• B

• C

• D

• E

Which of the following is the most reactive?

• A

• B

• C

• D

• E

The ground-state configuration of Fe3+ is which of the following?

• 1s^2 2s^2 2p^6 3s^2 3p^6 3d^6 4s^1

• 1s^2 2s^2 2p^6 3s^2 3p^6 3d^5

• 1s^2 2s^2 2p^6 3s^2 3p^6 3d^5 4s^2

• 1s^2 2s^2 2p^6 3s^2 3p^6 3d^6 4s^2

• 1s^2 2s^2 2p^6 3s^2 3p^6 3d^5 4s^1

Diamagnetic elements have all electrons paired in their orbitals. If an element has at least one electron by itself in an orbital, it is paramagnetic. Which of the following contains only atoms that are diamagnetic in their ground state?

• Kr, Ca & P

• Cl, Mg & Cd

• Ar, K & Ba

• He, Sr & C

• Ne, Be & Zn

A valence electron from an arsenic atom might have an electron with the following set of quantum numbers in the ground state.

• n = 4; l = 1; ml = 0; ms = +½

• n = 4; l = 1; ml = 2; ms = -½

• n = 3; l = 1; ml = 0; ms = +½

• n = 5; l = 1; ml = -1; ms = -½

• n = 4; l = 2; ml = ±1; ms = +½

This electron configuration is not possible.

• 1s² 2s² 2p⁶ 3s² 3p⁵

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁵ 5s² 4d¹

• 1s² 2s² 2p⁶ 3s² 3p⁶ 3d³

• 1s² 2s² 2p⁵

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶

The exact position of an electron is not known.

• Pauli exclusion principle

• electron shielding

• Heisenberg uncertainty principle

• Hund's rule

The reason the 4s orbital fills before the 3d:

• Pauli exclusion principle

• electron shielding

• Heisenberg uncertainty principle

• Hund's rule

Calcium reacts with element X to form an ionic compound. If the ground-state electron configuration of X is [Ar]...4p5, what is the simplest formula for this compound?

• CaX

• CaX2

• Ca4X2

• Ca3X2

• Ca2X3