Chemistry
'Formation of hydrogen molecule takes place by sharing of electrons'. Give a reason why the molecule of hydrogen is not formed by transfer of electrons.
Answer
Hydrogen is a non-metal and has 1 valence electron. To attain a stable duplet electronic configuration, each hydrogen atom needs one more electron. As both the combining atoms are one electron short, none of them can donate an electron. Hence, they share one pair of electrons and attain a stable duplet configuration.
Related Questions
Explain with the help of atomic orbit structure diagram the formation of calcium oxide.
Give a reason why - in the formation of electrovalent compound - magnesium chloride, one magnesium atom combines with two chlorine atoms to give magnesium chloride. [at. no. Mg=12, Cl=17, ]
Draw the atomic orbit structure diagram for formation of -
(a) hydrogen molecule
(b) chlorine molecule
(c) oxygen molecule
(d) nitrogen molecule
[at. no. H=1, Cl=17, O=8, N=7]
Give reasons for formation of single covalent bond between two chlorine atoms and a double covalent bond between two oxygen atoms - during formation of respective covalent molecules.