Which of the following statements are NOT true about the periodic table? A. The properties of elements are function of atomic weights. B. The properties of elements are function of atomic numbers. C.

Question

Which of the following statements are NOT true about the periodic table? A. The properties of elements are function of atomic weights. B. The properties of elements are function of atomic numbers. C. Elements having similar outer electronic configurations are arranged in same period. D. An element's location reflects the quantum number of the last filled orbital. E. The number of elements in a period is same as the number of atomic orbitals available in energy level that is being filled.

(A) B, C and E only
(B) D and E only
(C) A and E only
(D) A, C and E only

Prashant Kotian · Accepted Answer

Correct answer: D. The properties of elements are function of atomic number, not atomic weight. Number of elements in a period is double the number of orbitals filled between ns and (n + 1)s (previous inclusive).

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