Question

Which of the following electron configurations for neutral atoms is correct?


helium: 1s1, 1p1
nitrogen: 1s2, 2s2, 2p3
silicon: 1s2, 2s2, 3s2, 2p63p2
the third sub-level
Li

Answer 1

Answer: Nitrogen

Helium - 1s2 (There is no p sub-level in energy level 1)
Nitrogen - Correct
Silicon - They misplaced 2p6

Answer 2

Consider the two electron arrangements for neutral atoms A and B. What is the difference between atom A and atom B?

A - 1s2, 2s2, 2p6, 3s1

B - 1s2, 2s2, 2p6, 5s1


Atom B has lost some inner electrons.
The outer electron of atom B has moved to a lower energy state.
The outer electron of atom B has moved to a higher energy state.

Answer 3

The outer electron of atom B has moved to a higher energy state.

Answer 4

Complete the chart. (Remember to enter a "0" if necessary.)

Atomic Number: 3

1s:

2s:

2p:

3s:

3p:

4s:

3d:

4p:

5s:

Answer 5

1s2, 2s1. The rest are 0.
(Please open new questions for each question)

Answer 6

Select all that apply.

A beta particle:

is electromagnetic energy
is an electron
has zero charge
has zero mass
has a +2 charge
has a -1 charge

Answer 7

help please