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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
Write true or false for the following statement
The central pad of the atom is called 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.
What are the observations of the experiment done by Rutherford in order to determine the structure of an atom?
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.
Fill in the blank of the following statement :
The electron has _________ charge, the proton has _________ charge, and the neutron has _________ charge.
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.
Explain in brief – Goldstein’s experiment which led to the discovery of the proton.
Select the correct answer from the choice in the bracket to complete the sentence:
Magnesium atom with electronic configuration 2, 8, 2 achieves stable electronic configuration by losing two electrons, thereby achieving stable electronic configuration of the nearest noble gas _______.
