Question

An element m form the compound mh3 when reacts with hydrogen
Find the valency of element m
Write the valency of chlorine and sulphur
Name three isotopes of hydrogen

Answer 1

Answer:

a)valency is 3 b) chlorine valency is 1 and sulphur valency is 3 c) isotope is ^2H,^1H,^3H

Answer 2

Valency of m=3

Valency of chlorine=-1

Valency of sulfur=-2

Isotopes of hydrogen:Protium, deuterium and tritium

Explanation:

An element m form compound $mH_3$

when react with hydrogen

The reaction between m and hydrogen is given by

$2m+3H_2\rightarrow 2mH_3$

Valency of hydrogen=1

Therefore, the valency of m=3

Valency: It is defined as the number of gain electrons and loss of electrons to complete their octet.

Number of electrons in outermost shell of chlorine=7

It required 1 electron to complete their octet

Therefore, valency of chlorine=-1

Electrons in outermost shell of sulfur=6

It required 2 electrons to complete their octet.

Therefore, the valency of sulfur=-2

Isotope:when the mass number of elements  are different and atomic number are same  then the elements are called isotopes.

Isotopes of hydrogen are

Protium, deuterium and tritium.

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https://brainly.in/question/10670559: Answered by Ravikapoor