Question

Identify the specific element that corresponds to each of the following electron configurations. (Type your answer using the symbol of the element.)
(a) [Rn]7s25f 26d1


(b) [He]2s22p2


(c) [He]2s22p3


(d) [Ar]4s13d5

Answer 1

Solution.
(a)[Rn]7s25f26d1Pa
(b)[He]2s22p2C
(c)[He]2s22p3N
(d) [Ar]4s13d5Cr
Answer: Pa, C, N, Cr