Chlorine is an element of atomic number 17. It is a mixture of two isotopes having mass number of 35 and 37.
State the number of protons, electrons and neutrons in the following isotopes: ${}^{35}{Cl}_{17}$ , ${}^{37}{Cl}_{17}$ .

Open in App

Solution

Isotopes- Atoms of an element having the same atomic number but a different mass number are known as isotopes.
Atomic number(Z)- The total number of protons in the nucleus of an atom gives us the atomic number of that atom.
Mass number(A)- The number of protons and neutrons combine to give us the mass number of an atom.
For a neutral atom-
Atomic number= number of protons= number of electrons
Number of neutrons=mass number - atomic number=A-Z
In ${}^{35}{Cl}_{17}$ the atomic number of chlorine atom is 17 and its mass number is 35.
Number of neutrons=35-17=18
In ${}^{37}{Cl}_{17}$ the atomic number of the chlorine atom is 17 and its mass number is 37.
Number of neutrons=37-17=20
Isotope Number of electrons Number of protons Number of neutrons
${}^{35}{Cl}_{17}$ 17 17 18
${}^{37}{Cl}_{17}$ 17 17 20

Suggest Corrections

Similar questions

Chlorine is an element of atomic number 17. It is a mixture of two isotopes having mass number of 35 and 37.

Explain why the two atoms ${}^{35}{Cl}_{17}$ , ${}^{37}{Cl}_{17}$ have the same chemical reactions.

Chlorine is an element of atomic number 17. It is a mixture of two isotopes having a mass number of 35 and 37.

Write down the electronic configuration of the chlorine atom.

Chlorine is an element of atomic number 17. It is a mixture of two isotopes having mass numbers of 35 and 37.

(i) What is meant by “atomic number of an element”?

(ii) What do you understand by an 'atom'?

{}_{17}^{35}{Cl}

{}_{17}^{37}{Cl}

Chlorine is an element of atomic number 17. It is a mixture of two isotopes having mass number of 35 and 37.

(i) What is meant by “atomic number of an element” ?

(ii) Write down the electronic configuration of the Chlorine atom.

(iii) State the number of protons, electrons and neutrons in the following isotopes : ${}_{17}^{35}{Cl}$ & ${}_{17}^{37}{Cl}$

(iv) Explain why the two atoms in ${}_{17}^{35}{Cl}$ & ${}_{17}^{37}{Cl}$ have the same chemical reactions.

Join BYJU'S Learning Program