Question

Arrange the following elements as in the statement given in brackets. a) fluorine , lithium, carbon , nitrogen ( increasing order of atomic size) . b) potassium, lithium, hydrogen, calcium ( decreasing order of ionisation energy) .<br />

Answer 1

a) lithium , carbon , nitrogen , fluorin
b) hydrogen , lithium , calcium , potassium

Answer 2

what happens when an aqueous solution of sodium sulphate reacts with an aqueous solution of barium chloride? state the physical conditions of reactants in which the reaction between them will not take place. write the balanced chemical equation for the reaction and also mention the type of reaction.