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प्रश्न
Fill in the blank
The outermost shell of an atom is known as............................
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उत्तर
The outermost shell of an atom is known as valence shell.
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संबंधित प्रश्न
Give the following a suitable word/phrase.
Protons and neutrons present in the nucleus.
Give the following a suitable word/phrase.
The smallest unit of an element which takes part in a chemical reaction.
Name three fundamental particles of the atom. Give the symbol with charge, on each particle.
Tick the most appropriate answer.
In 1908, R A Millikan found the charge of an electron to be
- 1.6 x 10-19 C
- 1.6 x 10-15 C
- 1.4 x 10-19 C
- 1.6 x 19-16 C.
Tick the most appropriate answer.
How many times is a proton heavier than an electron?
- 1500
- 1800
- 1840
- none of these
WRITE SHORT ANSWER
What is the charge on a neutron ?
The particle not present in an ordinary hydrogen atom is :
State its one drawback of Rutherford’s atomic model.
Define the term Valence shell.
What is meant by the term subatomic particles?
