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प्रश्न
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.
पर्याय
Molecule
Orbits
Atom
Valency
Radical
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उत्तर
Molecule
APPEARS IN
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?
TRUE \ FALSE
Elements having a tendency to accept electrons are called metals
TRUE \ FALSE
Cathode rays are a stream of fast moving particles that travel in random directions.
ANSWER IN DETAIL
State the postulates of the Dalton’s atomic theory.
Fill in the blank:
Atoms are _____
Name the particles which revolve around the nucleus.
An atom has 13 protons and 14 neutrons.
What is the atomic number of the atom ?
Why is it not possible to see an atom even with the most powerful microscope ?
What value has been given to the mass of this reference atom ?
Is it possible to see atoms these days ? Explain your answer.
State two observations which show that atom is not indivisible.
For the symbols H, D and T, write the subatomic particles (protons, neutrons and electrons) found in each one of them.
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?
The electronic structure [configuration] of fluorine can be written as 2, 7. In a similar way give the electronic configuration of phosphorus
The smaller particles found in the atom is called ______.
The volume occupied by 4.4 g of CO2 at S.T.P ______
An atom of Oxygen (O) and two atoms of hydrogen (H.) combine to form a molecule of ______.
Atoms have a radius of the order ______.
A small block slides down on a smooth inclined plane, starting from rest at time t = 0. Let Sn be the distance travelled by the block in the interval t = n – 1 to t = n. Then, the ratio `S_n/(S_(n + 1))` is ______.
