Check sibling questions

Which of the following elements will form an acidic oxide?

(a) An element with atomic number 7

(b) An element with atomic number 3

(c) An element with atomic number 12

(d) An element with atomic number 19

 

Answer

Metals form basic oxides and non-metals form acidic oxides.

Metals gain electrons to become stable whereas, non-metals lose electrons to become stable.

  • Option (a) - Atomic number 7: Electronic configuration is 2, 5
  • Option (b) - Atomic number 3: Electronic configuration is 2, 1
  • Option (c) - Atomic number 12: Electronic configuration is 2, 8, 2
  • Option (d) - Atomic number 19: Electronic configuration is 2, 8, 8, 1

Among the given elements only (a) will gain electrons to become stable and is therefore a non metal. Hence, it will form an acidic oxide.

So, the correct option is (a) Atomic number 7

CA Maninder Singh's photo - Co-founder, Teachoo

Made by

CA Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 12 years and a teacher from the past 16 years. He teaches Science, Economics, Accounting and English at Teachoo