The number of neutrons present : 11
<h3>Further explanation</h3>
Given
²¹Ne
Required
Number of neutrons
Solution
In the following element notation,
X = symbol of element
A = mass number
= number of protons + number of neutrons
Z = atomic number
= number of protons = number of electrons, on neutral elements
So the symbol above shows the mass number Ne: 21
Ne itself has an atomic number of 10, so the number of neutrons :
number of neutrons = mass number - atomic number
number of neutrons = 21 - 10
number of neutrons = 11
Answer:
The electron configuration of an element is the arrangement of its electrons in its atomic orbitals. By knowing the electron configuration of an element, we can predict and explain a great deal of its chemistry.
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