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प्रश्न
State true or false. If false, correct the statement.
The basic unit of an element is molecule.
विकल्प
True
False
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उत्तर
False
Correct statement: The basic unit of an element is atom.
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संबंधित प्रश्न
ANSWER IN DETAIL
State the postulates of the Dalton’s atomic theory.
Define:- Atom
Write the names of the elements present in the:-
Sodium hydroxide
Write the names of `"Na"_3"PO"_4` compounds :
Name the particles which revolve around the nucleus.
Name the three subatomic particles present in an atom.
What is the usual symbol for (a) and electron (b) a proton, and (c) a neutron?
Dalton's atomic theory says that atoms are indivisible. Is this statement still valid ? Give reasons for your answer.
State two observations which show that atom is not indivisible.
Which of the following statement is correct about the atom of an element ?
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)
In what respects do the three isotopes of hydrogen differ? Give their structures.
State the meaning of the term – (a) atom, (b) molecule, (c) radical – with a suitable example.
Define – Atom.
The volume occupied by 1 mole of a diatomic gas at S.T.P is ______
1 mole of Gold and Silver contain same number of atoms.
Give the salient features of “Modern atomic theory”.
The first scientific theory about atoms was given by J J. Thomson.
