Which electron configuration is impossible? a. ls22s22p2d2

b. 1s22s22p63s23p64s

c. 1s22s22p63s23p3

d. 1s22s22p63s2

e. 1s22s22p63s23s54s

1

How is the atomic number of a nucleus changed by alpha decay

I'm learning about the periodic tables and what each subject's configuration is. for example, hydrogen is 1s^1, but i don't understand how you get that. can someone me understand how to figure out how to figure this out? sorry if the question makes no sense, but it would really a lot if you could me understand! you so much if you can!

Areader can tell that the meaning of “obnoxious” will include “having the quality of something” because of the .a) prefix b)pronunciation c)suffix d) word root