Which of the following given element has one electron, one proton and no neutron?

H

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L i

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C l

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H e

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Solution

The correct option is A $H$
The atomic number of Hydrogen is $(Z)$ = 1 and it's mass number $(A)$ is $1$ .

Therefore, number of neutrons $= A - Z = 0$ . Hence, it is represented by $_{1} H^{1}$ .

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Similar questions

Which of the following statement is correct about the atom of an element ?

(a) an atom can have only protons and neutrons but no electrons.

(b) an atom can have only electrons and neutrons but no protons

(d) an atom must always have a proton, neutron and electron

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