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The lightest element in the periodic table is

$\begin{array}{1 1}(a)\;\text{Lithium}\\(b)\;\text{Fluorine}\\(c)\;\text{Hydrogen}\\(d)\;\text{Helium}\end{array}$

1 Answer

The lightest elements are at the beginning on the periodic table.
Hydrogen is the lightest and the most plentiful element in the universe.
Hydrogen mass no is 1
Hence (c) is the correct answer.
answered Jan 22, 2014 by sreemathi.v
edited Nov 7, 2017 by sharmaaparna1