The mass number of the element is 9, atomic number is 4 and number of neutron is 5.
The number of proton which is used to separate one element from the other element is called Atomic Number. It is denotes as symbol Z.
What is Atomic Notation ?
The atomic number is the number of proton which is present in the nucleus of an atom. It is represented as [tex]^{A}_{Z}X[/tex].
where
X is the element
Z is the atomic number of that element.
A is the mass number of that isotope.
Now,
A = Z + N
9 = 4 + N
9 - 4 = N
5 = N
Thus from the above conclusion we can say The mass number of the element is 9, atomic number is 4 and number of neutron is 5.
Learn more about the Atomic Number here: https://brainly.com/question/487717
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