Question

Write the atomic weight of chlorine isotopes.

Answer 1

Hint: To write the atomic weights of isotopes, we should first know about the definition and examples of isotopes. We should also know about chlorine.

Step by step answer:
Let us first know about isotopes. We should know that isotopes are various forms of an element that have the same atomic number but different atomic mass. We know that the atomic mass of an element is equal to the number of electrons present in its atom. Or we can say that the atomic number of an element is equal to the number of protons present in its atom. And as we know that in case of atomic mass, the sum of the number of protons and number of neutrons that are present in the nuclei of an atom are equal to the atomic mass.
From the above paragraph we can understand the isotope with a new direction. We can say that isotopes are any of two or more forms of an element where the atoms have the same number of protons, but a different number of neutrons within their nuclei. Or we can say that atomic mass is different and atomic mass is equal in isotopes.
Let us understand this by one example of carbon. This is the example of hydrogen and their isotopes.

Isotope	Atomic number	Atomic mass	Proton	Electron	Neutron	representation
hydrogen	1	1	1	1	0
deuterium	1	2	1	1	1
tritium	1	3	1	1	2

In the same way we will find isotopes in the case of chlorine.

Isotope	Atomic number	Atomic mass	Proton	Electron	Neutron	representation
	17	35	17	17	18
	17	36	17	17	19
	17	337	17	17	20

In the above table we had successfully mentioned the isotopes of chlorine.

Note: We should note that we are using chlorine stable isotopes as a tool for tracing the origin and fate of fluids and rocks from the Earth's surface and interior. For example we can find the fluid movement in sedimentary basins.
We should know that isotopes undergo spontaneous decay during which they emit radiation and achieve a stable state. This property of radioisotopes is useful in food preservation, archaeological dating of artefacts and medical diagnosis and treatment.