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प्रश्न
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.
पर्याय
Molecule
Orbits
Atom
Valency
Radical
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उत्तर
Molecule
APPEARS IN
संबंधित प्रश्न
Why is it not possible to see an atom with naked eyes?
Tick the most appropriate answer.
Who discovered that radioactive rays are given out by uranium?
- Henri Becquerel
- Marie Curie
- Pierre Curie
- Schmidt
TRUE \ FALSE
Neils Bohr gave the theory to explain the arrangement of protons in an atom.
ANSWER IN DETAIL
How are isobars different from isotopes ?
Define:- Atom
Define:- Molecule
Write the names of the elements present in the:-
Sodium hydroxide
Fill in the blank
An ion with negative charge is called _______
Name two particles found inside the nucleus. What are they collectively called ?
Fill in the blank
If an atom loses an electron, it acquires ______ a charge.
Fill in the blank
An excess of electrons produces a ________ charge.
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
State the meaning of the term – (a) atom, (b) molecule, (c) radical – with a suitable example.
Select the correct answer to the statement given below:
Imaginary path around the nucleus of an atom in which electrons revolve.
Assertion: An atom is electrically neutral.
Reason: Atoms have equal number of protons and electrons.
The volume occupied by 4.4 g of CO2 at S.T.P ______
In the nucleus of `""_20"Ca"^40`, there are ______
The smallest unit of an element is ______.
The most abundant type of atom is the universe is ______.
