Answer:
Ba: 1s² 2s²2p⁶ 3s²3p⁶ 4s²3d¹⁰4p⁶ 5s²4d¹⁰5p⁶ 6s²
Step-by-step explanation:
Step 1. Locate barium in the Periodic Table.
It's in Period 6, Group 2: Element 56 (highlighted blue in the Periodic Table below).
Step 2. Add 54 electrons to the energy levels
You add then in the order shown in the diagram below.
The complete electron configuration is:
Ba: 1s² 2s²2p⁶ 3s²3p⁶ 4s²3d¹⁰4p⁶ 5s²4d¹⁰5p⁶ 6s²
n = 2 + 8 + 8 + 18 + 18 + 2 = 56
The structure of nicotine is as follows:
In the aromatic ring, nitrogen atom has two bonds and one lone pair therefore, hybridization will be . In five-membered ring , nitrogen has two bonds and 1 lone pair therefore, hybridization will be
.
Therefore, hybridization state of and
(as in the attached structure) is
and
respectively.
Now, according to VESPR theory for hybridization with one lone pair the geometry is bent and for
hybridization with one lone pair the geometry is pyramidal.
Therefore, geometry of and
(as in the attached structure) is bent and pyramidal respectively.
