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How many electrons are there in a molecule of HClO4?

Important Questions on Structure of Atom

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Chemistry>Physical Chemistry>Structure of Atom>Atomic Number and Atomic Mass Number
Which of the following conclusions could not be derived from Rutherford's α-particle scattering experiment:
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Chemistry>Physical Chemistry>Structure of Atom>Atomic Number and Atomic Mass Number
The nitride ion in lithium nitride is composed of
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Chemistry>Physical Chemistry>Structure of Atom>Atomic Number and Atomic Mass Number
Hydrogen has three isotopes A, B and C. If the number of neutron(s) in A, B and C respectively, are x, y and z, the sum of x, y and z is
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Chemistry>Physical Chemistry>Structure of Atom>Atomic Number and Atomic Mass Number
The number of protons, neutrons and electrons in C613 respectively are
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Chemistry>Physical Chemistry>Structure of Atom>Atomic Number and Atomic Mass Number
In the nuclear reaction Al2713+He42⟶X3014+H11,X is
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Chemistry>Physical Chemistry>Structure of Atom>Atomic Number and Atomic Mass Number
If the Thomson model of the atom was correct, then the result of Rutherford's gold foil experiment would have been:
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Chemistry>Physical Chemistry>Structure of Atom>Atomic Number and Atomic Mass Number
A dinegative ion of the element X consists of 10 electrons and 8 neutrons. A dipositive ion of the element Y consists of 12 protons. The number of neutrons in Y is 1.5 times the number of electrons in atom X. Then the mass numbers of X and Y would be in the ratio
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Chemistry>Physical Chemistry>Structure of Atom>Atomic Number and Atomic Mass Number

 Write the name of particle present at the center of electrons in represented Rutherford's model. Write one characteristic of this model.

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Chemistry>Physical Chemistry>Structure of Atom>Atomic Number and Atomic Mass Number
Consider a hypothetical case in which the charge of a proton is twice as that of an electron. Using this hypothetical case, how many protons P, neutrons N and electrons E would a neutral Na23 atom contain?
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Chemistry>Physical Chemistry>Structure of Atom>Atomic Number and Atomic Mass Number
The masses of an electron, a proton and a neutron respectively will be in the ratio
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Chemistry>Physical Chemistry>Structure of Atom>Atomic Number and Atomic Mass Number
The relation between the stopping potential V0 and frequency v is correctly represented in [ϕ= Work function]
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Chemistry>Physical Chemistry>Structure of Atom>Atomic Number and Atomic Mass Number
The number of protons, neutrons and electrons in 71175Lu, respectively, are
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Chemistry>Physical Chemistry>Structure of Atom>Atomic Number and Atomic Mass Number
The correct increasing order of the electronegativity is
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Chemistry>Physical Chemistry>Structure of Atom>Atomic Number and Atomic Mass Number
Isotopes are
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Chemistry>Physical Chemistry>Structure of Atom>Atomic Number and Atomic Mass Number
The sum of the total number of neutrons present in protium, deuterium and tritium is
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Chemistry>Physical Chemistry>Structure of Atom>Atomic Number and Atomic Mass Number
The product obtained after a positron emission from Ga6831 is
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Chemistry>Physical Chemistry>Structure of Atom>Atomic Number and Atomic Mass Number

Write the name of the particle present in the sphere of represented Thomson atomic model. Explain the model with one example.

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Chemistry>Physical Chemistry>Structure of Atom>Atomic Number and Atomic Mass Number
The introduction of a neutron into the nucleus of an atom would lead to a change in
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Chemistry>Physical Chemistry>Structure of Atom>Atomic Number and Atomic Mass Number
An element with mass number 181 contains 32% more neutrons as compared to protons. What is the symbol of that element?
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Chemistry>Physical Chemistry>Structure of Atom>Atomic Number and Atomic Mass Number
The number of electrons, protons and neutrons in a species are equal to 10,11 and 12 respectively. The proper symbol-of the species is