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प्रश्न
In all atoms of an element
विकल्प
the atomic and the mass number are same.
the mass number is same and the atomic number is different.
the atomic number is same and the mass number is different
both atomic and mass numbers may vary
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उत्तर
The atomic and the mass number are same.
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संबंधित प्रश्न
Tick the most appropriate answer.
Who discovered that radioactive rays are given out by uranium?
- Henri Becquerel
- Marie Curie
- Pierre Curie
- Schmidt
Define:- Atom
Fill in the blank
An ion with negative charge is called _______
What does the word ‘atom’ mean?
Name the particle or particles you would expect to find in :
The orbit of an atom
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the mass number of X?
Dalton's atomic theory says that atoms are indivisible. Is this statement still valid ? Give reasons for your answer.
For the symbols H, D and T, write the subatomic particles (protons, neutrons and electrons) found in each one of them.
The smallest unit of an element is ______.
What is the fundamental particle of an element?
