Question

An element X having atomic number 20 will ______ electrons and form _____ to attain the nearest noble gas electronic configuration.

• A. gain, anion
• B. lose, cation
• C. lose, anion
• D. gain, cation

Answer 1

The correct option is B lose, cation

• Atomic number of X is 20. So the electronic configuration is 2,8,8,2.
• The electronic configuration of the nearest noble gas is 2,8,8.
• So, X has to Lose electron and it will be $X^{+2}$.
• The correct option is a) lose,cation.