Question

An isotope contains 16 protons 18 electrons and 16 neutrons. what is the identity of the isotope

Answer 1

`^(32)_(16)S^(2-)`

Step-by-step explanation:

Atomic number : It is defined as the number of electrons or number of protons present in a neutral atom.

However, when we talk about the atomic number of the ion, it is not equal to the number of electrons as electron can be gained or loosed.

This is why, more appropriately, the number of the protons which are present in the nucleus of the atom is called the atomic number.

Thus, number of protons = atomic number = 16

The element must be sulfur.

Since, number of protons is not equal to the number of electrons, thus the isotope will not be neutral.

There are 2 more electrons than the number of protons and thus, the isotope will be having a charge of -2.

Mass number is the number of the entities present in the nucleus which is the equal to the sum of the number of protons and electrons.

Mass number = Number of protons + Number of neutrons = 16 + 16 = 32 neutrons

The identity is:-
`^(32)_(16)S^(2-)`

Answer 2

Sulfur ₁₆S³²

Step-by-step explanation:

The sulfur have sixteen protons sixteen neutrons and sixteen electrons. The sum of neutrons and protons is equal to atomic mass. So the given element have sixteen protons and sixteen electron, the atomic mass would be 32 and the element with atomic mass 32 is sulfur.

The number of electrons are equal to the number of protons. In the given element two electrons are more than number of protons. It means element gain two extra electron from another element and it is present in ionic form.

It is present in given form:

S²⁻

Electronic configuration:

S₁₆ = [Ne] 3s² 3p⁴

To complete the octet sulfur gain two electrons from other element and get stable.