Classification ...

The electronic configurations of three elements X, Y and Z are X 2, 8; Y 2, 8, 7 and Z 2, 8, 2. Which of the following is correct? 

Which of the following elements does not lose an electron easily? 

The electronic configurations of three elements, $$A, B$$ and $$C$$ are given below. What Stable form of $$A$$ may be represented by the formula:

The electronic configuration of the outermost shell of the most electronegative element is

The electronic configurations of three elements, $$A, B$$ and $$C$$ are given below. The molecular formula of the compound formed from $$B$$ and $$C$$ will be

The electronic configurations of three elements, $$A, B$$ and $$C$$ are given below. What Stable form of $$C$$ may be represented by the formula:

The outer electronic structure of lawrencium (atomic number $$103$$) is :

Among the following configurations, the element which has the highest electron affinity:

Which electronic configuration must represent an atom in an excited state?

Pick the correct statement :