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प्रश्न
The smallest particle of matter that can exist by itself is ______.
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उत्तर
The smallest particle of matter that can exist by itself is atom.
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संबंधित प्रश्न
MATCH THE COLUMNAS
| 1. Jpham Dalton | a. Neutrons |
| 2. Atom | b. Model of the atom |
| 3. Chadwick | c.The atomic theory of matter |
| 4. Rutherfrod | d. Positively charged |
| 5. Protons | e. Electricity neutral |
| 6. Nuclear fusion | f. Generator of electricity |
| 7.Gamma -rays | g. High penetrating power |
| h.Energy in sun |
TRUE \ FALSE
Cathode rays are a stream of fast moving particles that travel in random directions.
Write the names of the elements present in the following compound.
Common salt
Write the names of `"Ca"("NO"_3)_2` compounds :
Give the charge and the mass of an electron, proton and neutron present in an atom ?
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
Does the particle have an excess of electrons or a deficiency of electrons ?
Name the unit in which the radius of an atom is usually expressed.
Why is it not possible to see an atom even with the most powerful microscope ?
The electron shell ______ is nearest to the nucleus.
What is the contribution of the following in atomic structure?
Maharshi Kanada
In what respects do the three isotopes of hydrogen differ? Give their structures.
Compare:
Chlorine atom and chloride ion, with respect to
Atomic structure
Electrical state
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which element will gain electron?
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
What will be the charge present of the molecule XY after chemical combination?
Define the following term with an example.
Compound
In all atoms of an element
You are provided with a fine white coloured powder which is either sugar or salt. How would you identify it without tasting?
Write any two observations which support the fact that atoms are divisible.
