Question

since no one is on chemistry.
Match the following elements with the correct electron configuration.


1s22s22p63s23p6


1s22s22p63s23p64s23d5


[Ar] 4s2


1s22s22p62d103s23p3


[Kr] 5s24d10

1.
Cd

2.
P

3.
Ca

4.
Ar

5.
Mn

Answer 1

Do you know how to count electrons?

Answer 2

[Ar] 4s^2 means that you look for Argon on the periodic table and then move to spaces over. To find the element Calcium.