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प्रश्न
Define:- Atom
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उत्तर
Atom: An atom is the smallest indivisible unit of an
OR
Atom is the smallest unit of matter.
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संबंधित प्रश्न
Why is it not possible to see an atom with naked eyes?
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 |
ANSWER IN DETAIL
State the postulates of the Dalton’s atomic theory.
Write the names of the elements present in the:-
Ammonia
Write the names of `"Ca"("NO"_3)_2` compounds :
Write the names of `"Na"_3"PO"_4` compounds :
Fill in the blank
An ion with negative charge is called _______
Define: Mass number
What does an atom consist of ? Explain.
Name the particles which revolve around the nucleus.
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is such a particle called ?
How many times is a proton heavier than an electron?
What is an atom ? How do atoms usually exist ?
In what respects do the three isotopes of hydrogen differ? Give their structures.
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which element will lose electron?
Select the correct answer to the statement given below:
The basic unit of matter is not capable of independent existence.
K: Potassium:: C: ______.
You are provided with a fine white coloured powder which is either sugar or salt. How would you identify it without tasting?
What is the fundamental particle of an element?
A small block slides down on a smooth inclined plane, starting from rest at time t = 0. Let Sn be the distance travelled by the block in the interval t = n – 1 to t = n. Then, the ratio `S_n/(S_(n + 1))` is ______.
