Question

write the four quantum number for 2p4 electron

Answer 1

Four quantum numbers for 2p4 electron are as follows -

• The four type of quantum numbers are

1. Principal quantum number (n)
2. Azimuthal quantum number (l)
3. Magnetic quantum number (m)
4. Spin quantum number (s)

• For 2p4 electron :

• The principal quantum number will be 2
• The azimuthal quantum number will be 1
• The magnetic quantum number will be -1
• The spin quantum number will be -½

• Principal number (n) can be determined by the number written on the left of the orbital denoting letters (ie. s,p,d,f). Here, in 2p4 that specific number is 2. So principal quantum number is 2
• Azimuthal quantum number can be found by using this series : s = 0 , p = 1 , d = 2 , f = 3. Here, p orbital causes value of azimuthal quantum number 1
• Now, magnetic quantum number can be found in this way - here, l = 1 , so magnetic quantum numbers can be -1,0,+1. But, the given4th electron lands on -1, that's why -1 will be magnetic quantum number.
• The sign convention of the 4th electron is a downward arrow, and that's why spin quantum number will be -½