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प्रश्न
Is it possible to see atoms these days ? Explain your answer.
उत्तर
Yes, it is possible to see atoms these days, with the help of advanced technology. Electronic microscopes are extremely powerful and can magnify even the smallest particle. A Scanning Tunnelling Microscope (STM) can be used to produce highly magnified images of the surface of elements on a computer screen. Therefore, a highly sophisticated STM can be used to view atoms indirectly.
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संबंधित प्रश्न
Why is it not possible to see an atom with naked eyes?
TRUE \ FALSE
Elements having a tendency to accept electrons are called metals
ANSWER IN DETAIL
State the postulates of the Dalton’s atomic theory.
Define: Relative atomic mass
Name the particle or particles you would expect to find in :
The orbit of an atom
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is such a particle called ?
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
Does the particle have an excess of electrons or a deficiency of electrons ?
Fill in the blank
An _______ is electrically neutral.
State two observations which show that atom is not indivisible.
Find the mass of 2 moles of nitrogen atoms.
Select the correct answer to the statement given below:
The basic unit of matter is not capable of independent existence.
Rewrite the given sentence in correct form.
Elements contain two or more kind of atoms and compounds contain only one kind of atom.
The basic unit of matter is ______.
State true or false. If false, correct the statement.
The basic unit of an element is molecule.
K: Potassium:: C: ______.
Which of the following statements made by Dalton has not undergone any change?
In all atoms of an element
A change in the physical state can be brought about
What is the fundamental particle of an element?
