BeH 2  is covalent hydride and having polymeric structure in solid state in which beryllium atoms are bonded together by  three centre-two e...

Alums are used as Mordant in dyeing because when fabric to be dyed in dipped a solution of alum and heated with steam. Hydrolysis of [Al(H2O...

Lithium  metal has low density and is a light metal than other alkali metal and therefore floats on the surface of the kerosene oil. To prev...

Alkall metals, when exposed to atmosphere react with oxygen, moisture and CO2 present in the air forming oxides, hydroxide and carbonates. I...

LiCl is covalent because Li+ ion is smaller in size as compared to Na+ ion and hence it has high polarising power than Na+ ion, as result Li...

Lithium forms only oxides and not stable peroxide or superoxides, due to small size of Lithium, it has a strong positive field around it. On...

Low  ionization enthalpy, strongly electropositive nature, tendency to attain noble gas configuration by the loss of one valence electron ma...

Potassium  is softer than sodium due to weak metallic bonding because of the large size of K atoms. 

Lithium

The  E o  value (reduction potential) depends on the three factors i.e. sublimation, ionization and hydration enthalpies. With the small siz...

This  is due to abnormal increase in the atomic size of potassium.

Sodium  is the most abundant alkali metal in the earth's crust.

The  three general characteristics are: (1)The compounds of the s-block elements are mainly ionic. (2)The valency is equal to the group numb...

The  alkali metals have low densities due to their large atomic sizes. In fact, Li, Na and K are even lighter than water.

The most reactive alkali metal is cesium due to its lowest first ionization enthalpy and lowest electronegativity.

The  Group first elements are called alkali metals because they form water soluble hydroxides. Like LiOH, NaOH, KOH, RbOH and CsOH etc.

Potassium carbonate cannot be prepared by Solvay proces due to the reason that potassium bicarbonate (KHCO3) formed as an intermediate (When...

All halides  of 2nd group elements are ionic in nature except Beryllium halides. BeCl 2  is soluble in organic solvents and anhydrous BeCl 2...

The structures of sodium and potassium bicarbonates provide interesting examples of hydrogen bonding.  (1) In the potassium salt con...

NAMING OF 1st GROUP: The group 1 st containing Li, Na, K, Rb, Cs & Fr , Francium is radioactive and has a very short life ( t 1/2=  ...