The ground state electronic configuration of Cu 2+ ion has to be predicted. Concept-Introduction: Aufbau principle: Electrons first occupy orbitals with lower energy than higher energy. An orbital can be occupied only by two electrons having opposite spins. Each electron fills each orbital till it is half filled. Greater the number of parallel spins of electrons more stable the orbital. This is known as Hund’s rule. The order of electrons filling in an atom is given as Figure 1

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6. Match each of the lettered items in the column on the left with the most appropriate numbered item(s) in the column on the right. Some of the numbered items may be used more than once and some not at all. a. Z = 37 1. b. Mn 2. C. Pr element in period 5 and group 14 element in period 5 and group 15 d. S e. [Rn] 7s¹ f. d block metal 3. highest metallic character of all the elements 4. paramagnetic with 5 unpaired electrons 5. 4f36s2 6. isoelectronic with Ca²+ cation 7. an alkaline metal 8. an f-block element

Answer 1

Question

Chapter 8, Problem 8B.4ST

(a)

Interpretation Introduction

Interpretation:

The ground state electronic configuration of Cu2+ ion has to be predicted.

Concept-Introduction:

Aufbau principle:

Electrons first occupy orbitals with lower energy than higher energy.

An orbital can be occupied only by two electrons having opposite spins.

Each electron fills each orbital till it is half filled. Greater the number of parallel spins of electrons more stable the orbital. This is known as Hund’s rule.

The order of electrons filling in an atom is given as

Figure 1

(b)

Interpretation Introduction

Interpretation:

The ground state electronic configuration of S2- ion has to be predicted.

Concept-Introduction:

Aufbau principle:

Electrons first occupy orbitals with lower energy than higher energy.

An orbital can be occupied only by two electrons having opposite spins.

Each electron fills each orbital till it is half filled. Greater the number of parallel spins of electrons more stable the orbital. This is known as Hund’s rule.

The order of electrons filling in an atom is given as

Figure 1

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