Consider the following statements about an element ‘X’ with number of protons 13. 

(A) It forms amphoteric oxide.

(B) Its valency is three.

(C) The formula of its chloride is XCl.

The correct statements(s) is/are:

(a) only (A)

(b) only (B)

(c) (A) and (C)

(d) (A), (B) and (C)



Number of protons in X = Number of electrons in X = 13


Electronic configuration of X= 2, 8, 3

The element with the electronic configuration given above is Aluminium.

Checking the options:

  • (A) It forms amphoteric oxide - Aluminium oxide is an amphoteric oxide. So, this is true.
  • (B) Its valency is three - The number of electrons in the outermost shell is 3. So, this is true.
  • (C) The formula of its chloride is XCl - The formula of aluminium chloride is AlCl 3 . So, this is not true.

Therefore, the correct options are (A) and (B)

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CA Maninder Singh is a Chartered Accountant for the past 14 years and a teacher from the past 18 years. He teaches Science, Economics, Accounting and English at Teachoo