Beryllium and magnesium do not give colour to flame whereas other alkaline earth metals do so, why?

Why, alkali metals and the alkaline earth metals do not occur in free state?

Consider the following statements and arrange in the order of true or false I) Group 2 elements are known as alkaline earth metal except Be II) Be has the highest standard reduction potential among group 2 members III) Mg burns with dazzling brilliance in air to give MgO and Mg (NO_(3))_(2) IV) Calcium and barium metals are used to remove air from vacuum tubes (1) TTTT (2) FFFF (3) TTFT (4) TFFT

The elements which form coloured ions and show paramagnetism are: Alkali metals , Alkaline earth metals , Halogens , Transition elements.

The s-block of periodic table constitutes alkali metals and alkaline earth metals. The hydroxides and carbonates of sodium and potassium are more soluble than that of corresponding salts of Magnesium and Calcium.Explain.

Silianes get easily hydrolysed whereas alkanes do not. Give reasons.

Which pair of the following chlorides do not impart colour to the flame ?