Statement 1 (S1): An atom contains three kinds of sub-atomic particles which are electrons, protons and neutrons.
Statement 2 (S2): Mass of a neutron is almost the same as that of an electron.

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Solution

An atom contains three kinds of sub-atomic particles which are electrons, protons and neutrons.

So, S1 is true.

The mass of a neutron is almost the same as that of a proton. Moreover, the mass of a proton is approximately 2000 times as that of the electron.

So, S2 is false.

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Similar questions

(a) an atom has equal number of electrons and protons

(b) an atom has equal number of electrons and neutrons

(d) an atom has equal number of electrons, protons and neutrons

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

Select the sub-atomic particles that are present in the nucleus of an atom.

A. Electrons

B. Protons

C. Neutrons

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