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प्रश्न
Give the following a suitable word/phrase.
The electrons present in the outermost shell.
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उत्तर
This outermost shell is known as the valence shell, and the electrons found in it are called valence electrons.
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संबंधित प्रश्न
Write true or false for the following statement
The central pad of the atom is called nucleus.
Explain the rule with example according to which electrons are filled in various energy levels
FILL IN THE BLANK
The electrons revolving in shells close to the nucleus are called ................... electrons.
Tick the most appropriate answer.
How many times is a proton heavier than an electron?
- 1500
- 1800
- 1840
- none of these
WRITE SHORT ANSWER
Describe a discharge tube.
Why is an atom neutral inspite of the presence of charged particles in it?
Compare an electron, a proton and a neutron in respect of their relative masses and charges.
Compare a proton and a neutron in respect of mass and charge.
Define the term Mass number.
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.
