Nuclei with the same number of protons but a different number of neutrons are called isobars
Nuclei with the same number of neutrons but a different atomic number are called isotopes
Nuclei with the same mass number are called isotones
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Q3
A helium nucleus (also called as α particle) consists of two protons and two neutrons. For a singly ionized helium atom He+, the electron's speed in the second orbit (n=2) is___×106m/s.
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Q4
Structures of nuclei of three atoms A, B and C are given below: A has 90 protons and 146 neutrons. B has 92 protons and 146 neutrons. C has 90 protons and 148 neutrons. Based on the above data, A and C are isotopes; B and C are ___.
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Q5
If Fp−p,Fp−n,Fn−n are nuclear forces between two protons, a proton and a neutron and two neutrons respectively inside a nucleus, then