Question

***the steps involved in writing the chemical formula of a substance are given below :

i ) write symbols of elements

ii ) If the valenceies are identical, cancel the valenceies

iii ) write the valency of the elements

iv ) If the valenceies are different , criss - cross and place them with reference to the symbol

***which of these is correct sequence of writing the chemical formula

a.) i ii iii iv
b.) i iii ii iv
c.) i iv ii iii
d.) i iii iv ii
​​

Answer 1

i think ---a is the correct option

i ) write symbols of elements

ii ) If the valenceies are identical, cancel the valenceies

iii ) write the valency of the elements

iv ) If the valenceies are different , criss - cross and place them with reference to the symbol

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Answer 2

Answer:(b)

If we write valency then we have to write first symbols

we cancel the valence if write valency

If the valenceies are not identical then we criss - cross and place them with reference to the symbol