X, Y and Z are three elements with atomic numbers (x-1), x and (x+1) respectively. If Y is a noble gas answer the following.
Which of these elements would have the least ionisation energy? Justify.

X, Y and Z are three elements with atomic numbers (x-1), x and (x+1) respectively. If Y is a noble gas answer the following. To which group X and Z belong?

X, Y and Z are three elements with atomic numbers (x-1), x and (x+1) respectively. If Y is a noble gas answer the following. Among X, Y and Z which would have positive value for electron gain enthalpy? Why?

X, Y and Z are respectively :

X, Y and Z are respectively :

Substances X,Y,Z and A are respectively

There are three shells in the atom of element 'X', 6 electrons are present in its outermost shell. In which group is this element included?

There are three shells in the atom of element 'X', 6 electrons are present in its outermost shell. In which period does this element belong?

If the atomic number of an inert gas element is Z, then an element with which of the following electronic configurations will have the highest electronegativity (according to Pauling scale)?