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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
WRITE SHORT ANSWER
Name three inert gases.
Write the names of the elements present in the following compound.
Common salt
Write the names of the elements present in the:-
Glucose
Name two particles found inside the nucleus. What are they collectively called ?
Who originated the word ‘atom’ ?
Write the full form of IUPAC.
How many times is a proton heavier than an electron?
Calculate the number of moles in 12.044 × 1025 atoms of phosphorus.
Electron, proton, neutron are the types of ______ in an atom.
In what respects do the three isotopes of hydrogen differ? Give their structures.
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
What will be the charge present of the molecule XY after chemical combination?
Draw the basic structure of an atom representing its –
- Subatomic particles
- Nucleus
- Orbits or shells.
The electronic structure [configuration] of fluorine can be written as 2, 7. In a similar way give the electronic configuration of phosphorus
Name the sub-atomic particles.
Project.
To have an idea of what atoms are, students can be asked to construct atoms using pipe cleaners (thin metal wires-electron shells), pompoms (balls-different colours for protons and neutrons) and beads (electrons). Students will love and enjoy putting them together and they look great hanging from the ceiling in the classroom.
Define the following term with an example.
Compound
Does the solubility of a substance change with temperature? Explain with the help of an example.
Write any two observations which support the fact that atoms are divisible.
Lead is also known as plumbum.
