Q. 75.0( 2 Votes )
An element has mass number = 35 and atomic number = 17 find
(i) The number of neutrons in the element,
(ii) The number of electrons in the outermost shell.
Mass number given = 35
Atomic number of element = 17
(i) Neutrons = 35 – 17 = 18
(ii) To find number of electrons in outermost shell we will have to find the electronic configuration of the element.
For atomic number 17,
K = 2
L = 8
M = 7
The number of electrons as we can see from the electronic configuration is 7.
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