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The nuclei have been separated on the basis of the number of protons (atomic number) or the total number of nucleons (mass number) as given below:
(i) Isotopes: The atoms of element having similar atomic number but different mass number are called as isotopes. All isotopes have the same chemical properties.
(ii) Isobars: The nuclei which have the similar mass number (A) but different atomic number (Z) are called isobars. Isobars occupy dissimilar positions in periodic table so all isobars have dissimilar chemical characteristics.
(iii) Isotones: The nuclei having equal number of neutrons are known as isotones. For them both the atomic number (Z) and mass number (A) are dissimilar, but the value of (A - Z) is same.
(iv) Mirror nuclei: Nuclei having the similar mass number A but with the proton number (Z) and neutron number (A - Z) interchanged (or whose atomic number vary by 1) are known as mirror nuclei
A beam of light of wavelength λ = 5000Å falling normally on a plane diffraction grating. The 1 st order spectrum is derived in a direction making an angle θ 1 with the norma
Rydberg constant (Rydberg): A constant that governs the relationship of the spectral line features of an atom by the Rydberg formula. For hydrogen, it is about 1.097 x 10 7 m
how much force is necessary to stop the car when steps on a brake a 1000-kg car travelling at 65 km/h if the braking distance is 35 m?
Construction of UJT The fundamental structure of a UJT is illustrated in fig. (a). It comprises an n-type silicon bar that is lightly doped. Two end connections are taken fr
Why does heated air expand? Temperature is often explained as the average thermal energy of the substance at hand. Therefore the hotter a substance is the more thermal energy i
Two forces P & 2P act on the particle if the first is doubled & the second enhanced by 20N.The direction of the resultant remains unchanged. What is the value of P.
eqution of two perpendicular of somple harmonic otion of same period
What makes a flashlight suddenly become dim or bright when you shake it?
Describe how tunneling takes place in reversed bias When junction is reversed biased, p-region moves up with respect to the n-region as a result, filled energy levels on p- sid
Electrons and holes in semi-counductor Metals have free electrons available in conduction band for conduction of electric current. As the valence band overlaps the conduction b
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