How many electrons in an atom may have the following quantum numbers?

(a) n = 4, m=$$-\dfrac{1}{2}$$

(b) n = 3, l = 0

Asked by Pragya Singh | 1 year ago |  105

#### 1 Answer

##### Solution :-

(a) If n is the principal quantum number, the total number of electrons in the atom = 2n2

For n = 4, Total no. electrons = 2 (4)2 = 32

Electron configuration for an atom with 32 electrons: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 .

Hence, all the electrons are paired.

No. electrons having n = 4 and m

=$$-(\dfrac{1}{2})$$ = 16

(b) n = 3, l = 0 indicates the 3s orbital. Therefore, no. electrons with n = 3 and l = 0 is 2.

Answered by Pragya Singh | 1 year ago

### Related Questions

#### How many sub-shells are associated with n = 4?

Answer the following questions:-

(a) How many sub-shells are associated with n = 4?

(b) How many electrons will be present in the sub-shells having ms value of $$- \dfrac{1}{2}$$ for n = 4?

Class 11 Chemistry Structure of Atom View Answer

#### Indicate the number of unpaired electrons in:

Indicate the number of unpaired electrons in:

(a) P

(b) Si

(c) Cr

(d) Fe

(e) Kr

Class 11 Chemistry Structure of Atom View Answer

#### The unpaired electrons in Al and Si are present in 3p orbital.

The unpaired electrons in Al and Si are present in 3p orbital. Which electrons will experience more effective nuclear charge from the nucleus?

Class 11 Chemistry Structure of Atom View Answer

#### Among the following pairs of orbitals which orbital will experience the larger effective nuclear charge?

Among the following pairs of orbitals which orbital will experience the larger effective nuclear charge?

(i) 2s and 3s,

(ii) 4d and 4f,

(iii) 3d and 3p

Class 11 Chemistry Structure of Atom View Answer

#### The bromine atom possesses 35 electrons. It contains 6 electrons in 2p orbital, 6 electrons in 3p orbital

The bromine atom possesses 35 electrons. It contains 6 electrons in 2p orbital, 6 electrons in 3p orbital and 5 electrons in 4p orbital. Which of these electron experiences the lowest effective nuclear charge?

Class 11 Chemistry Structure of Atom View Answer