Question

Сколько неспаренных электронов содержат невозбужденные атомы В,S,As на последнем энергетическом уровне

Answer 1

В- 1 неспаренный электрон (1s2 2s2 2p1)
S- 2 неспаренных электронов (1s2 2s2 2p6 3s2 3p4)
As- 3 неспаренных электрона (1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p3)

Answer 2

Number of Unpaired Electrons in Unexcited Atoms of B, S, As on the Last Energy Level

The number of unpaired electrons in unexcited atoms of Boron (B), Sulfur (S), and Arsenic (As) on the last energy level can be determined by examining their electron configurations.

1. Boron (B): - The electron configuration of Boron is 1s² 2s² 2p¹. - The last energy level for Boron is the 2p level. - Since there is one electron in the 2p orbital, there is 1 unpaired electron in unexcited Boron atoms.

2. Sulfur (S): - The electron configuration of Sulfur is 1s² 2s² 2p⁶ 3s² 3p⁴. - The last energy level for Sulfur is the 3p level. - Since there are four electrons in the 3p orbital, there are 4 unpaired electrons in unexcited Sulfur atoms.

3. Arsenic (As): - The electron configuration of Arsenic is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p³. - The last energy level for Arsenic is the 4p level. - Since there are three electrons in the 4p orbital, there are 3 unpaired electrons in unexcited Arsenic atoms.

Therefore, the number of unpaired electrons in unexcited atoms of Boron, Sulfur, and Arsenic on the last energy level are as follows: - Boron (B): 1 unpaired electron - Sulfur (S): 4 unpaired electrons - Arsenic (As): 3 unpaired electrons