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प्रश्न
Fill in the blank
An _______ is electrically neutral.
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उत्तर
An atom is electrically neutral
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संबंधित प्रश्न
Why is it not possible to see an atom with naked eyes?
TRUE \ FALSE
Neils Bohr gave the theory to explain the arrangement of protons in an atom.
TRUE \ FALSE
Cathode rays are a stream of fast moving particles that travel in random directions.
WRITE SHORT ANSWER
Name three inert gases.
Define:- Molecule
Define:- Radicals
Write the names of the elements present in the:-
Glucose
Define: Covalent bond
Fill in the blank
If an atom loses an electron, it acquires ______ a charge.
Name the three subatomic particles present in an atom.
How is the size of an atom indicated ?
Dalton's atomic theory says that atoms are indivisible. Is this statement still valid ? Give reasons for your answer.
What is an atom ? How do atoms usually exist ?
Which has more atoms, 50 g of aluminium or 50 g of iron ? Illustrate your answer with the help of calculations.
(Atomic masses : Al = 27 u ; Fe = 25 u)
Give scientific reason.
All the mass of an atom is concentrated in the nucleus.
Draw diagrams representing the atomic structures of the following:
- Sodium atom
- Chlorine ion
- Carbon atom
- Oxygen ion
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.
State true or false. If false, correct the statement.
An atom is electrically neutral.
Which of the following has maximum number of atoms?
You are provided with a fine white coloured powder which is either sugar or salt. How would you identify it without tasting?
