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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?
ANSWER IN DETAIL
How are isobars different from isotopes ?
Fill in the blank:
Atoms are _____
Give the charge and the mass of an electron, proton and neutron present in an atom ?
State Dalton’s atomic theory.
Fill in the blank
If an atom gains an electron, it is called an _______
Write the relation between nanometre and metre.
Fill in the following blanks with suitable words :
In water, the proportion of oxygen and hydrogen is .............. by mass.
Is it possible to see atoms these days ? Explain your answer.
Give scientific reason.
All the mass of an atom is concentrated in the nucleus.
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which element will lose electron?
The smallest particle of matter that can exist by itself is ______.
Define the following term with an example.
Metal
Which of the following has maximum number of atoms?
Write any two observations which support the fact that atoms are divisible.
______ is a substance that is made up of three oxygen atoms chemically combined.
What is the fundamental particle of an element?
The ______ are combination of atoms of various elements or the same element.
Atoms have a radius of the order ______.
