Tag: discovery of subatomic particles

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Multiple choice chemistry what is inside atom discovery of neutrons structure of atoms discovery of subatomic particles

The fundamental particle which has no charge and has mass almost equal to that of positively charged fundamental particle is ..............

  1. proton

  2. neutron

  3. electron
  4. $\beta$-particle
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The fundamental particle which has no charge and has mass almost equal to that of positively charged fundamental particle is neutron.

Multiple choice chemistry what is inside atom discovery of neutrons structure of atoms discovery of subatomic particles

The mass of an atom is : 

  1. the sum of the masses of protons and electrons present in the nucleus.

  2. equal to the mass of neutrons in the nucleus.

  3. the sum of the masses of protons and neutrons present in the nucleus.

  4. none of the above.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The mass of an atom is given by the sum of the masses of protons and neutrons present in the nucleus.

Multiple choice chemistry what is inside atom discovery of neutrons structure of atoms discovery of subatomic particles

A neutron has :

  1. positive charge

  2. negative charge

  3. no charge

  4. all of above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The neutron is a subatomic particle with no net electric charge and a mass slightly larger than that of a proton. Protons and neutrons, each with mass approximately one atomic mass unit, constitute the nucleus of an atom, and they are collectively referred to as nucleons.

Multiple choice chemistry what is inside atom discovery of neutrons structure of atoms discovery of subatomic particles

Who was awarded Nobel prize for discovery of neutron?

  1. Chadwick

  2. Dalton

  3. Rutherford

  4. Thomson
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

James Chadwick was assigned the task of tracking down evidence of Rutherford's tightly bound "proton-electron pair" or neutron. In 1932, Chadwick proposed that this particle was Rutherford's neutron. In 1935, he was awarded the Nobel Prize for his discovery.

Multiple choice chemistry what is inside atom discovery of neutrons structure of atoms discovery of subatomic particles

When beryllium was bombarded with alpha particles, this lead to the formation of :

  1. C-13 and protons

  2. C-12 and neutrons

  3. C-13 and electrons

  4. C-13 and neutrons
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Chadwick carried the experiments, using many different elements as radiation targets besides paraffin. What really occurred when one bombarded beryllium with alpha particles, there was the formation of a carbon-12 nucleus and the emission of a neutron.