Four elements W, X, Y and Z contain 8, 11, 9 and 17 protons per atom respectively. The element which cannot form an anion is most likely to be :(a) W (b) X (c) Y (d) Z

Correct Answer: (b) X

Explanation: Element X can’t form anions as the outermost orbit contains only 1 electron. The atom will rather lose this electron to complete its octet and will become a cation.