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Modern Periodic Table

A metal 'M' h...

Question

A metal 'M' has the electronic configuration 2, 8, 3 and occurs in nature as M $_{2}$ O $_{4}$ . It is more reactive than zinc. Name the metal 'M'.

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Solution

The metal 'M' is aluminium(Al).

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Q. A metal 'M' has the electronic configuration 2, 8, 3 and occurs in nature as M

_{2}

_{4}

. It is more reactive than zinc. Write a chemical equation illustrating the use of this metal for joining cracked railway lines.

A

has electronic configuration of

2, 8, 1

and metal B has electronic configuration of

2, 8, 2

. Which metal is more reactive and why?

Q. Assertion: Sodium Metal is reactive where as Sodium Ions aren't reactive.

Reason: Sodium Metal has an electronic configuration of 2, 8, 1. Sodium Ions have a configuration of 2, 8.

Metal 'M' has the electronic configuration 2, 8, 1.

(i) What is the valency of Metal 'M'?

(ii) Is it oxidizing or reducing in nature?

(iii) Give the formula of its chloride.

Q. Experimentally it was found that a metal oxide has formula

M_{0.98} O

M

M^{2 +}

M^{3 +}

%

of the metal which exists as

M^{3 +}

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