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प्रश्न
What does the word ‘atom’ mean?
उत्तर
“atom” means‘indivisible”
APPEARS IN
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 |
ANSWER IN DETAIL
Enlist the features of Bohr’s model of an atom. How did he correct the Rutherford’s model ?
Define:- Atom
Write the names of the elements present in the :-
Sulphuric acid
Write the names of `("NH"_4)_2"SO"_4` compounds:
Fill in the blank
A charged particle is called an _____
Fill in the blank
An _______ is electrically neutral.
What are the building blocks of matter ?
Is it possible to see atoms these days ? Explain your answer.
An atom of an element X may be written as `""_9^4"X"`
(a) What does the figure 9 indicate?
(b) What does the figure 4 indicate?
(c) What is the number of protons in atom X?
(d) What is the number of neutrons in atom X?
(e) What is the number of electrons in atom X?
(f) How many electrons are there in the outermost shell of an atom of element X?
(g) Write the symbol of ion formed by an atom of element X.
Give scientific reason.
All the mass of an atom is concentrated in the nucleus.
Compare:
Chlorine atom and chloride ion, with respect to
Atomic structure
Electrical state
Name the gas that.
Turns moist starch iodide paper blue black.
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which will form negative ion?
Select the correct answer to the statement given below:
The basic unit of matter is not capable of independent existence.
Select the correct answer to the statement given below:
The smallest particle of a substance – capable of independent existence and which retains the characteristics of the substance.
Draw the structure of an atom and explain the position of the sub-atomic particles.
The volume occupied by 1 mole of a diatomic gas at S.T.P is ______
Which of the following has maximum number of atoms?
A change in the physical state can be brought about
