Q7 of 29 Page 85

Imagine what would happen if we do not have standard symbols for elements?

if we do not have standard symbols for elements, then it will take a lot of time to write the full name of the elements and compounds every time to describe a reaction.


More from this chapter

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5

0.24g sample of compound of oxygen and boron was found by analysis to contain 0.144g of oxygen and 0.096g of boron. Calculate the percentage composition of the compound by weight.

 6

In a class, a teacher asked to write the molecular formula of oxygen Shamita wrote the formula as O2 and Priyanka as O. which one is correct? State the reason.

 8

Mohith said "H2 differs from 2H". Justify.

 9

Lakshmi gives a statement "CO and Co both represents element". Is it correct? State reason.