Given the valence electron configuration of an element is 4s1. Then w – InterviewSolution

1.

Given the valence electron configuration of an element is 4s1. Then what are its quantum number values. Which element does it represent?

Answer»

1. Given valence electronic configuration is 4s¹.

2. So n = 4 for ‘s’ sub shell l = 0 and if l is ‘O’ then m is also zero.

3. m_s takes only two values that is + 1/2 or - 1/2 for convenience we can take m as + 1/2

∴ The quantum number values are like this

n	l	m_l	m_s
4	0	0	+ 1/2

4. The element is potassium.

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