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प्रश्न
Draw the basic structure of an atom representing its –
- Subatomic particles
- Nucleus
- Orbits or shells.
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उत्तर
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संबंधित प्रश्न
The average atomic mass of a sample of an element X is 16.2 u. What are the percentages of isotopes `""_8^16X" and """_8^18X` in the sample?
Tick the most appropriate answer.
Who discovered that radioactive rays are given out by uranium?
- Henri Becquerel
- Marie Curie
- Pierre Curie
- Schmidt
Write the names of `"FeS"` compounds :
Give the charge and the mass of an electron, proton and neutron present in an atom ?
What are orbits or shells ?
Name the particle or particles you would expect to find in :
The nucleus of an atom
An atom has 13 protons and 14 neutrons.
What is the atomic mass of the atom ?
Fill in the blank
If an atom loses an electron, it acquires ______ a charge.
What are the building blocks of matter ?
How is the size of an atom indicated ?
Write the relation between nanometre and metre.
What is an atom ? How do atoms usually exist ?
How many atoms are there in exactly 12 g of carbon-12 element ? (C = 12 u)
Draw the diagrams representing the atomic structures of the following: Neon
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which will form negative ion?
The electronic structure [configuration] of fluorine can be written as 2, 7. In a similar way give the electronic configuration of phosphorus
Define the following term with an example.
Metal
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
Write any two observations which support the fact that atoms are divisible.
The graphite refill used is pencil is made of element called ______.
