The number of matrices having 7 elements is……………

Find the number of matrices having 12 elements

Out of the first 100 elements the number of elements having electrons in the 3d orbital are

Consider the following elements B C F Cl N O If x,y and z are the number of elements having more electron affinity (Ea_(1)) than nitrogen, the number of elements having ionisation energy more than that of Na and the number of elements having electronegativity more than (or) almost equal to N respectively, find x+y+z . Fill your answer as sum of digit (excluding decimal places) till you get the single digit answer.

The number of 2xx2 matrices A , that are there with the elements as real numbers satisfying A+A^(T)=I and A A^(T)=I is

An nxxn matrix is formed using 0,1 and -1 as its elements. The number of such matrices which are skew-symmetric, is

Find the number of g atoms and weight of an element having 2 xx 10^(23) atoms. Atomic mass of element is 32.

Find the number of g atoms and weight of an element having 2 xx 10^(23) atoms. Atomic mass of element is 32.