Question

When crystals of lead nitrate heated strongly in write test tube a crystal immediately melt?

Answer 1

[5&4.0\\ \cline{1-8}Atomic \: (Period\:II)&LNa&Mg&Al&sI&P&S&Cl \\ \cline{1-8}Electronegativity&1.0&1.5&2.0&2.5&3.0&3.5&4.0\\ \cline{1-8} \end{tabular}[/tex]