Question

3 2. 3 (i) The smallest unit of a pure substance which always exists independently, is called alan (a) atom (b) molecule (c) nucleus (d) none of these (ii) The molecular formula of aluminium sulphate is : (a) AISO4 (b) Al(SO4)3 (c) Al,SO4 (d) Al2(SO4)3
(iii) A group of non-metals possessing positive charge or negative charge, is called alan (a) atom (b) molecule (c) radical (d) valency 5​

Answer 1

Answer:

i) atom

ii) Al2(SO4)3

iii) halogen

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