Atomic Numbers and Electron Configurations

Question 1

Which diagram shows the correct electron configuration for fluorine (F)?

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A group of five short lines. The first line has an up and a down arrow above it and is labeled 1 s below. The second line has an up and a down arrow and is labeled 2 s. The third and fourth lines each have an up and a down arrow; the fifth line has an up arrow . The third, fourth, and fifth lines are bracketed with the label 2 p.

Question 2

1s22s22p6: 1s22s22p63s23p3: 1s22s22p63s23p64s1: 1s22s22p63s23p64s23d8: 1s22s22p63s23p64s23d104p65s24d3:

Revolt · Accepted Answer

1s22s22p6:: Ne; 1s22s22p63s23p3:: P; 1s22s22p63s23p64s1:: K; 1s22s22p63s23p64s23d8:: Ni; 1s22s22p63s23p64s23d104p65s24d3:: Nb

Question 3

B: 1s2 2sA2pBA = B =

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Part 1: 2; Part 2: 1

Question 4

Na: 1s22sC2pD3sEC =

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Part 1: 2; Part 2: 6; Part 3: 1; 2

Question 5

D =

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6

Question 6

E =

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1

Question 7

The electron configuration for aluminum (Al) is shown below:1s22s22p63s23p1Which diagram shows the correct distribution of electrons in the electron shells of an aluminum atom?

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An orange dot has 3 concentric circles surrounding it. The innermost circle has green dots at the north and south positions. The center circle has 8 dots spaced unevenly. The outer circle has three dots, spaced so that two are closer to each other than either is to the third.

Question 8

What rule/principle states that electrons fill orbitals from lowest energy to highest energy?

Revolt · Accepted Answer

Aufbau principle

Question 9

What rule/principle states that electrons in the same sublevel (p, d, or f) are placed in individual orbitals, before they are paired up, to increase atomic stability?

Revolt · Accepted Answer

Hund’s rule

Atomic Numbers and Electron Configurations Answers

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