[" ( ) " Which hiert gas is refreshners in shoups.Do you think these substances are ionic or covalent? Why "],[" You can buy solid air-freshners of the elements X and Y having atomic numbers of "3" and 6respectic "],[" Give the formulae of the chlorides of the elements X and Y having atomic numbers of "3" and 6respectic "],[" Will the properties of the two chlorides be similar or different? Explain your answer.? "]