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प्रश्न
Define the term Nucleons.
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उत्तर
The protons and neutrons collectively are known as nucleons.
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संबंधित प्रश्न
Fill in the blank
Neutrons are .......................... particles having mass equal to that of protons.
FILL IN THE BLANK
In an atom, the last shell containing electrons is called its..................shell.
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
What is an atom?
ANSWER IN DETAIL
Write a note on valence shell.
Why is an atom neutral inspite of the presence of charged particles in it?
Explain in brief – Goldstein’s experiment which led to the discovery of the proton.
State how electrons are distributed in an atom. Explain in brief the rules which govern their distribution.
Select the correct answer from the choice in the bracket to complete the sentence:
An element ‘X’ has six electrons in its outer or valence shell. Its valency is __________.
Select the correct answer from the choice in the bracket to complete the sentence:
A ________ is a sub-atomic particle with no charge and unit mass.
