How many electrons in an atom may have the ...

NCERT Class XI Chemistry Structure of Atom Solutions

Question : 31 of 67

Marks: +1, -0

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

(a) n = 4,

m_s

= –1/2

(b) n = 3, l = 0

Solution:

(a) Total number of electrons in n = 4 is

2n^2

2(4)^2

= 32

But half of these electrons have

m_s

= –1/2

∴ Number of electrons = 16

(b) Number of electrons = 2 [Since 3s subshell]

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