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प्रश्न
Why is it not possible to see an atom even with the most powerful microscope ?
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उत्तर
Atoms are the building blocks of nature. They are tiniest particles in nature and optical microscopes cannot magnify the image of such a tiny object, so that becomes visible to us. It is possible to watch an atom under an electron microscope.
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संबंधित प्रश्न
Define: Chemical bond
Name two particles found inside the nucleus. What are they collectively called ?
What does the word ‘atom’ mean?
Fill in the blank
A deficiency of electrons produces a ________ charge.
Write the full form of IUPAC.
How many times is a proton heavier than an electron?
The electronic configuration of an element Z is 2, 8, 8.
(a) What is the atomic number of the element?
(b) State whether element Z is a metal or a non-metal.
(c) What type of ion (if any) will be formed by an atom of element Z? Why?
(d) What is special about the outermost electron shell of the atom of this element?
(e) Give the name and symbol of element Z.
(f) Name the group of elements to which Z belongs.
Give scientific reason.
All the mass of an atom is concentrated in the nucleus.
Electron, proton, neutron are the types of ______ in an atom.
The electron shell ______ is nearest to the nucleus.
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which will form negative ion?
Select the correct answer to the statement given below:
The smallest particle of a substance – capable of independent existence and which retains the characteristics of the substance.
The smaller particles found in the atom is called ______.
Define the following term with an example.
Non-metal
In the nucleus of `""_20"Ca"^40`, there are ______
Atoms of one element can be transmuted into atoms of other elements by ______
Give the salient features of “Modern atomic theory”.
The graphite refill used is pencil is made of element called ______.
