Answers

2014-10-17T14:33:36+05:30
Hydrogen is the Element which has Atomic no. with 1 ,Atomic Weight is 1.008.
It is a Non-Metal and Diatomic.
It was artificially produced by Henry Cavendish in 1766 as he mixes metals with acid.

It has three Isotopes they are, Tritium,Protitum and Deutritium. 
Deutritium is also called Heavy Water.
It is highly combustible gas.
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  • Brainly User
2014-10-17T15:19:16+05:30
hydrogen atomic number is 1 in it's outer most shell 1 electron is need to stable or 1 electron need to loose to get stable.so it is known in two ways[1+]and [1-].
in nature it is found in different forms such as hydrogen sulphide and etc..
it is most plentiful element  known to exist, but it's also the first one on the periodic table. it is non metal.
it's symbol is H.
IT'S ATOMIC WEIGHT IS  1.00794 UNIT.
                                                             PLZ MARK IT BEST
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