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प्रश्न
Define the term Valence shell.
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उत्तर
The outermost shell of an atom is known as its valence shell.
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संबंधित प्रश्न
Fill in the blank
Neutrons are .......................... particles having mass equal to that of protons.
Write true or false for the following statement
The maximum number of electrons in the first shell can be 8.
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
Tick the most appropriate answer.
How many times is a proton heavier than an electron?
- 1500
- 1800
- 1840
- none of these
Name the negatively charged particle present in the atoms of all the elements.
Why is an atom neutral inspite of the presence of charged particles in it?
Compare a proton and a neutron in respect of mass and charge.
State the location of electrons, protons and neutrons in an atom.
If an atom ‘A’ has an atomic number of eleven, state the number of protons and electrons it contains.
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.
