________ the lightest of all solid elements.

A crystalline solid

The most reactive element of all the elements is

What is a solid waste ?

What is the similarity in the valency of all the elements of group 1 in the modern periodic table?

Which of the following dioxide of group 14 elements is not solid ?

Find the minor and cofactors of all the elements of the determinants {:|( 1,-2),(4,3)|:}

a) What property do all elements in the same column of the periodic table as boron share? b) What property do all elements in the same column of the periodic table as fluorine share?

It is said that elemental composition of living organisms and that of inanimate objects (like earth's crust ) are similar in the sense that all the major elements are present in both. Then what would be the difference between these two groups ? Choose a correct answer from the following.

The lightest gas which is non-inflammable is