When `A = phi`, then number of elements in P(A) is

The total number of subsets of a finite set A has 56 more elements then the total number of subsets of another finite set B. What is the number of elements in the set A ?

If the set A has p elements, B has q elements, then the number of elements in AxxB is:

If a set P has n elements, then the number of elements in the power set P is:

If A is of order mxxn , find the number of elements in a column of A.

If A and B be two sets containing 6 and 3 elements respectively, what can be the minimum number of elements in AuuB ? Also, find the maximum number of elements in AuuB .

Define mass number of an element.

The ion of an element has 3 positive charges. The mass number of atom of this element is 27 and the number of neutrons is 14. What is the number of electrons in the ion ?

What is the atomic number of elements whose outermost electrons are represented by 2p ^(3)

What is the atomic number of elements whose outermost electrons are represented by 3p ^(5)