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प्रश्न
State true or false. If false, correct the statement.
The basic unit of an element is molecule.
पर्याय
True
False
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उत्तर
False
Correct statement: The basic unit of an element is atom.
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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
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
Fill in the blank
An ion with positive charge is called ______
What are orbits or shells ?
An atom has 13 protons and 14 neutrons.
What is the atomic mass of the atom ?
Define: An Atom:
What is the usual symbol for (a) and electron (b) a proton, and (c) a neutron?
Define the following term:
Atom
State the meaning of the term – (a) atom, (b) molecule, (c) radical – with a suitable example.
Define – Atom.
Define the following term with an example.
Compound
Define the following term with an example.
Non-metal
The number of atoms present in a molecule is called its ______.
A sample of vitamic C is known to contain 2.58 ×1024 oxygen atoms. How many moles of oxygen atoms are present in the sample?
The smallest unit of an element is ______.
