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Variable Oxidation States

Name the elem...

Question

Name the element which is a non-metal with valency three.

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Solution

$Boron is a non metal with valency 3. It belongs to$
$group 13 .$

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Q. (i) Name three elements each whose ions have valency +1,+2 and +3 respectively.
(ii) Name three non-metals/radicals which have valency -1,-2 and -3.

X

is a metal with a valency 2. Element

Y

is a non-metal with a valency 3.

The balance equations to show how

X

Y

Q. Element X is a metal with a valency 2, Y is a non-metal with a valency 3.Write an equation, to show how Y forms an ion.

Q. Question 12
Elements with valency 1 are

(a) always metals
(b) always metalloids
(c) either metals or non-metals
(d) always non-metals

X

is a metal with a valency 2. Element

Y

is a non-metal with a valency 3.

If Y is a diatomic gas, the balance equations for the direct combination of X and Y to form a compound is :

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