About numbers

Covalency of elements expalins about number of ___ formed by atoms.

The following data about number of girls in a family was recorded. A family is chosen at random. Find the probability of having 2 girls in the chosen family.

Which statements (s) about oxidation number is (are) correct?

Which of the following statement about quantum number is correct ?

Which of the following statement about quantum number is wrong ?

Which of the following statement about quantum number is correct ?

Which of the following statement about quantum number is wrong ?

The number of nearest neighbours with which a given sphere, of packing is in contact, is called coordination number. The incorrect statement about coordination number is: