Electronic Configuration (Chem 101)

What is the electron configuration of K+?

1s2 2s2 2p6 3s2 3p6

Which of the following represents the electron configuration of P3-?

1s2 2s2 2p6 3s2 3p6

Which of the following is the electron configuration of a neutral K atom?

1s2 2s2 2p6 3s2 3p6 4s1

Arsenic is a toxic acid often used in the past as a component of pesticides. Which of the following represents the correct ground-state configuration for a neutral atom of arsenic?

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p3

Arsenic is a toxic acid often used in the past as a component of pesticides. Which of the following represents the correct ground-state configuration for the arsenide ion?

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6

Arsenic is a toxic acid often used in the past as a component of pesticides. How many electrons are present in a neutral atom of arsenic?

33

Which of the orbital electron configuration is not possible?

4p7

What is the noble gas core in the electron configuration for Sb?

Kr

Which of the following pairs of ions represent isoelectronic species?

Mg2+ and 02-

Which of the following pairs of irons represents isoelectronic species?

Mg2+ and O2-

Which of the element has the electron configuration 1s2 2s2 2p6 3s2 3p6 4s2 3d5?

Mn

Which of the following ions has the electron configuration of 1s2 2s2 2p6?

N3-

Which pair of violence electrons have the same valence electronic configuration of np3?

P and Sb

Which of the following electron configurations is incorrect?

S [Ne] 3s2 3p4

Which element have the ground state electron configuration of [Kr] 4d10 5s2 5p3?

Sb

What is the noble gas core in the electron configuration for Yb?

Xe

What is the noble gas electron configuration of Ca?

[Ar] 4s2

Which of the following is the electron configuration for Ba?

[Xe] 6s2