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प्रश्न
Name the three subatomic particles present in an atom.
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उत्तर
The three subatomic particles present in an atom are: electron, proton and neutron.
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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
WRITE SHORT ANSWER
Name three inert gases.
Fill in the blank
An ion with negative charge is called _______
Define: Ions
Define: Mass number
What is the maximum number of electrons present in:
1. first shell
2. second shell
3. third shell and
4. fourth shell
State Dalton’s atomic theory.
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What is the atomic mass of the atom ?
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What is such a particle called ?
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| Group 'A' | Group 'B' |
| a. Proton | i. Negatively charged |
| b. Electron | ii. Neutral |
| c. Neutron | iii. Positively charged |
What is the contribution of the following in atomic structure?
Maharshi Kanada
Draw the basic structure of an atom representing its –
- Subatomic particles
- Nucleus
- Orbits or shells.
State true or false. If false, correct the statement.
The basic unit of an element is molecule.
In all atoms of an element
The volume occupied by 4.4 g of CO2 at S.T.P ______
Which of the following has maximum number of atoms?
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The smallest unit of an element is ______.
