Question

Write 4 quantum numbers in sequence for

a) the last electron of Al

b) for last electron of Ca

c)the 50^th electron of W

Show words . DO not copy/see prevous CHEGG answer

thanks

Answer 1

a)Al is located in group 3 tells you that it has 3 valence electrons. The first valence electron is added to the 3p orbital when the orbital is empty, so we assign it a positive spin, or m2=+12.

This means that you have

n=3

l=1
m=?1
s=+1/2

b)calcium is located in group 2 tells that it has 2 valence electrons. The first valence electron is added to the 4s orbital when the orbital is empty, so we assign it a positive spin, or m=+1/2.

This implies that the second valence electron that is added to the 4s orbital will have a negative spin, ms=?1/2.

This means that you have

n=4,l=0,ml=0,ms+?12