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प्रश्न
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.
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उत्तर
Do it yourself.
APPEARS IN
संबंधित प्रश्न
ANSWER IN DETAIL
State the postulates of the Dalton’s atomic theory.
Write the names of the elements present in the:-
Ammonia
Write the names of `"Na"_3"PO"_4` compounds :
Fill in the blank:
Atoms are _____
Fill in the blank
An ion with negative charge is 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
A charged particle is called an _____
Name the unit in which the radius of an atom is usually expressed.
Why is it not possible to see an atom even with the most powerful microscope ?
How many times is a proton heavier than an electron?
What value has been given to the mass of this reference atom ?
Define the following term:
Atom
Compare:
Chlorine atom and chloride ion, with respect to
Atomic structure
Electrical state
The electronic structure [configuration] of fluorine can be written as 2, 7. In a similar way give the electronic configuration of aluminium
Which of the following statements made by Dalton has not undergone any change?
In all atoms of an element
Dalton’s atomic theory successfully explained
(i) Law of conservation of mass
(ii) Law of constant composition
(iii) Law of radioactivity
(iv) Law of multiple proportions
The smallest unit of an element is ______.
The first scientific theory about atoms was given by J J. Thomson.
