Which of the following electron configurations is incorrect? A) Ca [Ar]4s? B) Mn [Ar]4s²4d° C) Cu [Ar]4s'3d10 D) Ga [Ar]4s?3d1°4p1 E) Br [Ar]4s?3d10°4p®

Identify each element below, and give the symbols of the other elements in its group:(a) [Ar] 4s²³d1¹⁰4p²(b) [Ar] 4s²³d⁷(c) [Kr] 5s²4d⁵

Which of the following is the electron configuration of the iron(II) ion (Fe2+)?  Select one: a. [Ar]4s23d9 b. [Ar]4s23d2 c. [Ar]4s13d5 d. [Ar]3d6 e. [Ar]3d5 Clear my choice

Which arrangement is in the correct order of increasing radii? Select one: a. Cs < Mn2+ < Mn b. Ra < Li < Li+ c. Cr < Cr3+ < Ca d. H< He+ e. P < P3− < As3−

What is the electron configuration for Br? O [Ar]4s?3d104p6 [Ar]4s²3d104p5 [Ar]4s²4p6 [Ar]4s²4d104p6 [Ar]4s²3d104p4

29) Give the correct electron configurations of Cr and Cu. Explain why they do not have the expected electron configurations. a) Which of the following are correct electron configuration(s) for Cr? a) [Ar]3d44s2 b) [Ar]3d54s1 c) [Ar]4s23d5 d) [Ar]4s13d4   b) Which of the following are correct electron configuration(s) for Cu? a) [Ar]3d94s2 b) [Ar]3d104s1 c) [Ar]4s13d9 d) [Ar]4s23d10   c) Why do Cr and Cu not have the expected electron configurations? a) Half filled orbitals are more stable than partially filled orbitals. b) Completely filled orbitals are more stable than partially filled orbitals. c) Partially filled orbitals are more stable than completely filled orbitals. d) Moving an electron from the s to d orbital lowers the energy of the atom. e) Moving an electron from the s to d orbital increases the energy of the atom.

Consider a magnesium (Mg) atom that could have an electronic configuration of either [Ne]3s2 or [Ne]3s13p1.  Discuss the following: a)  Give one argument for why the [Ne]3s2 configuration might be more stable. b)  Give one argument for why the [Ne]3s13p1 configuration might be more stable. c)  Which configuration does Mg actually adopt and why?

Bromine is used in the manufacture of disinfectant products, it has a very strong oxidizing character, due to the great electronic affinity it presents. Based on therefore, what will be the electron affinity in kJ/mol of bromine from the following equations?. Explain the development.

18. Which of the following electron configurations is correct? a) Ga: [Kr]4s²3d04p! b) Mo: [Kr]5s²4d c) Ca: [Ar]4s'3do d) Br: [Ar]4s²3d04p³

Which oxide is amphoteric?  A) LiO B) BeO C) CaO D) BaO