Question

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

Atomic Number: 19

1s:

2s:

2p:

3s:

3p:

4s:

3d:

4p:

5s:

Answer 1

[Ar] 4s1
1s2
2s2
2p6
3s2
3p6
4s1
<3

Answer 2

The completed chart atomic number 19 is as below ,

1S 2

2s 2

2p 6

3s 2

3p 6

4s 1

3d 0

4p 0

5s 0

Step-by-step explanation

According to Aufbau principle in ground state, electrons of atom fill the atomic orbital of lowest energy level before occupying that of higher energy level .

• 1s orbital is of lower energy and is filled first , followed by 2s orbital , 2p orbital , 3s orbital, 3p orbital and finally 4s orbital

• S orbital can hold a maximum of 2 electrons . P orbital can hold a maximum of 6 electrons while d orbital can hold a maximum of of 10 electrons.

Therefore element in atomic number 19 has 1s2 2s2 2p6 3s2 3p6 4s1 electron configuration .