Write the oxidation state of manganese in each of these and also the sub-shell electronic configuration of each. Compound Oxidation state of Mn Sub-shell electronic configuration of Mn ions MnCl 2 - 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3 d 5 MnO 2 + 4 - Mn 2 O 3 - - Mn 2 O 7 - -

In the case of transition elements the difference in energy between the outermost S sub-shell and the penultimate d sub-shell is very small. Hence, under suitable conditions the electrons in d sub-shell also take part in chemical reactions. Hence, transition elements show variable oxidation states. Compound Oxidation state of Mn Sub-shell electronic configuration of Mn ions MnCl 2 + 2 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3 d 5 MnO 2 + 4 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3 d 3 Mn 2 O 3 + 3 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3 d 4 Mn 2 O 7 + 7 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6

E M B I B E

Chemistry Standard X Part 1>Chapter 1 - Periodic Table and Electronic Configuration>Exercise

HARD

10th Kerala Board

IMPORTANT

Earn 100

Find the oxidation state of $Fe$ in these compounds and then complete the table.

Compound Oxidation state of $Fe$ Symbol of $Fe$ ions

${FeCl}_{2}$

${FeCl}_{3}$

Important Questions on Periodic Table and Electronic Configuration

HARD

10th Kerala Board

IMPORTANT

Chemistry Standard X Part 1>Chapter 1 - Periodic Table and Electronic Configuration>Exercise

How does

Fe

change to

{Fe}^{2 +}

?

MEDIUM

10th Kerala Board

IMPORTANT

Chemistry Standard X Part 1>Chapter 1 - Periodic Table and Electronic Configuration>Exercise>Q ●

Write down the subshell electronic configuration of

{Fe}^{2 +}

.

MEDIUM

10th Kerala Board

IMPORTANT

Chemistry Standard X Part 1>Chapter 1 - Periodic Table and Electronic Configuration>Exercise>Q ●

In

{FeCl}_{3}

, iron loses

3

electrons to form

{Fe}^{3 +}

ion. If so, which will be the subshell from which iron loses the third electron?

MEDIUM

10th Kerala Board

IMPORTANT

Chemistry Standard X Part 1>Chapter 1 - Periodic Table and Electronic Configuration>Exercise>Q ●

Write the electronic configuration of

{Fe}^{3 +}

on the basis of this.

HARD

10th Kerala Board

IMPORTANT

Chemistry Standard X Part 1>Chapter 1 - Periodic Table and Electronic Configuration>Exercise

Manganese is the element with atomic number

25 .

Write the sub-shell electronic configuration of Manganese

(Mn)

.

HARD

10th Kerala Board

IMPORTANT

Chemistry Standard X Part 1>Chapter 1 - Periodic Table and Electronic Configuration>Exercise

Write the oxidation state of manganese in each of these and also the sub-shell electronic configuration of each.

Compound	Oxidation state of $Mn$	Sub-shell electronic configuration of $Mn$ ions
${MnCl}_{2}$	-	$1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 3 d^{5}$
${MnO}_{2}$	$+ 4$	-
${Mn}_{2} O_{3}$	-	-
${Mn}_{2} O_{7}$	-	-