Elements of Group 1 & 2
Introduction : group 1st and group 2nd are also known as S block elements Group first contain: hydrogen, lithium, sodium, potassium, rubidium, cesium, francium Group second contain : Beryllium, magnesium, calcium, strontium, barium, radium in this chapter we are going to see the p hysical and chemical properties of group first and second elements step by step first of all we start from hydrogen. Hydrogen : Hydrogen is the first element in the periodic table. It placed at the top of the group first of the alkali metal , but it differs from alkali metal in number of respects and hence it studied separately hydrogen atom consist of nucleus of +1 charge And one extra nuclear electron, hydrogen has less tendency to lose this electron however it bears this one with other electron to form covalent bond it exists in diatomic form as a H molecule therefore it is called as dihydrogen...