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प्रश्न
Name the three subatomic particles present in an atom.
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उत्तर
The three subatomic particles present in an atom are: electron, proton and neutron.
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संबंधित प्रश्न
TRUE \ FALSE
Neils Bohr gave the theory to explain the arrangement of protons in an atom.
WRITE SHORT ANSWER
Name three inert gases.
Write the names of the elements present in the :-
Sulphuric acid
Write the names of the elements present in the:-
Glucose
Define: Mass number
Name three non-metals/radicals which have valency -1, -2, and -3.
Fill in the blank
If an atom loses an electron, it acquires ______ a charge.
Dalton's atomic theory says that atoms are indivisible. Is this statement still valid ? Give reasons for your answer.
Which of the following statement is correct about the atom of an element ?
How many atoms are there in exactly 12 g of carbon-12 element ? (C = 12 u)
State the meaning of the term – (a) atom, (b) molecule, (c) radical – with a suitable example.
State true or false. If false, correct the statement.
The basic unit of an element is molecule.
Name the sub-atomic particles.
Project.
To have an idea of what atoms are, students can be asked to construct atoms using pipe cleaners (thin metal wires-electron shells), pompoms (balls-different colours for protons and neutrons) and beads (electrons). Students will love and enjoy putting them together and they look great hanging from the ceiling in the classroom.
Define the following term with an example.
Metal
1 mole of Gold and Silver contain same number of atoms.
The smallest unit of an element is ______.
What are the 3 most abundant atoms on the earth?
The first scientific theory about atoms was given by J J. Thomson.
Atoms have a radius of the order ______.
