Question

Chlorine is an element of atomic number 17. It is a mixtureof two isotopes having mass number of 35 and 37.(i) What is meant by "atomic number of an element" ?What do you understand by an 'atom' ?(ii) Write down the electronic configuration of the chlorineatom.(iii) State the number of protons, electrons and neutronsin the following isotopes : 35C117, 370l17(iv) Explain why the two atoms in (iii) above have thesame chemical reactions.​

Answer 1

(i) The atomic number of an element can be defined as the number of electrons present in an element

(ii) (2,8,7) is the electronic configuration of chlorine atom.

Answer 2

Answer:

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