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प्रश्न
Name the three fundamental particles of an atom.
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उत्तर
The three fundamental particles of an atom are electron proton and neutron.
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संबंधित प्रश्न
Fill in the blank
The outermost shell of an atom is known as............................
Give the following a suitable word/phrase
Arrangement of electrons in the shells of an atom.
Multiple Choice Questions
number of valence electrons present in magnesium is
FILL IN THE BLANK
Gases become good conductors of electricity under ........ (low/high) pressure and .............. (low/high) voltage electrical discharge.
FILL IN THE BLANK
In an atom, the last shell containing electrons is called its..................shell.
FILL IN THE BLANK
The γ-rays are............................ radiations, like light.
Tick the most appropriate answer.
Which of the following scientists observed that cathode rays consists of negatively charged particles?
- John Dalton
- J J Thomson
- James Chadwick
- Democritus
WRITE SHORT ANSWER
Name the isotopes of hydrogen.
Name the sub-atomic particle whose charge is 0.
State its one drawback of Rutherford’s atomic model.
