___________ experimentally proved the existence of protons in the atom.

Goldstein

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J.J.Thomson

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Chadwick

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None of the above

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Solution

The correct option is B Goldstein
Goldstein experimentally proved the existence of protons in the atom. Since the atom is electrically neutral there must be positively charged particles present in the atom to neutralize the negative charges of the electrons.

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Q. It is found experimentally that

13.6

eV energy required to separate a hydrogen atom into a proton and an electron.Calculate the velocity of the electron in hydrogen atom.

Q. Question 2
Rutherford's alpha(a) particles scattering experiment resulted in the discovery of

(a) Electron
(b) Proton
(c) Nucleus in the atom
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Question 2
Rutherford's alpha(a) particles scattering experiment resulted in the discovery of
(a) Electron
(b) Proton
(c) Nucleus in the atom
(d) Atomic mass

I

. During Rutherford's gold foil experiment, a beam of alpha particles was directed at a thin sheet of gold foil. This helped to prove the existence of a nucleus in the atom.

I I

. Most of the positively charged alpha particles were able to pass undeflected through the gold foil.

Atom A has a mass number 209 and atomic number 82.

Atom B has a mass number 209 and atomic number 83.

(i) How many protons atom A has ?

(ii) How many protons atom B has ?

(iii) Are atoms A and B isotopes of the same element ?

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___________ experimentally proved the existence of protons in the atom.

The correct option is B GoldsteinGoldstein experimentally proved the existence of protons in the atom. Since the atom is electrically neutral there must be positively charged particles present in the atom to neutralize the negative charges of the electrons.

The correct option is B Goldstein
Goldstein experimentally proved the existence of protons in the atom. Since the atom is electrically neutral there must be positively charged particles present in the atom to neutralize the negative charges of the electrons.