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प्रश्न
Give the following a suitable word/phrase.
The smallest unit of an element which takes part in a chemical reaction.
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उत्तर
Atom
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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.
Give the following a suitable word/phrase
Arrangement of electrons in the shells of an atom.
Give the following a suitable word/phrase.
The sum of the number of protons and neutrons of an atom.
Multiple Choice Questions
The outermost shell of an atom is known as
Mention briefly the salient features of Dalton’s atomic theory (five points)
TRUE \ FALSE
Electrons are present in the nucleus.
WRITE SHORT ANSWER
What do you mean by electron transition?
Explain how the modern atomic theory contradicted Dalton’s atomic theory.
If an atom ‘A’ has an atomic number of eleven, state the number of protons and electrons it contains.
