Modern Physics 7 Question 37
39. If elements with principal quantum number were not allowed in nature, the number of possible elements would be
(a) 60
(b) 32
(c) 4
(d) 64
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Solution:
- The maximum number of electrons in an orbit are
. If , is not allowed, then the number of maximum electrons that can be in first four orbit are :
Therefore, possible elements can be 60 .