GK
NUCLEAR SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Mass number
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Atomic number
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Atomic mass
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Number of protons
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Detailed explanation-1: -Explanation: The 206 seen in the upper left of the symbol is the mass number of the isotope and tells us the total number of nucleons (neutrons and protons combined) in the nucleus.
Detailed explanation-2: -The mass number (represented by the letter A) is defined as the total number of protons and neutrons in an atom.
Detailed explanation-3: -A 206Pb nucleus has 82 protons and 124 neutrons, which gives a ratio of 82/124, or 0.661.
Detailed explanation-4: -The mass number (symbol A, from the German word Atomgewicht [atomic weight]), also called atomic mass number or nucleon number, is the total number of protons and neutrons (together known as nucleons) in an atomic nucleus.
Detailed explanation-5: –The mass number of the given nucleus $ 82^206Pb$ is 206.-Therefore the number of neutrons in $ 82^206Pb$ = 206 – 82 = 124.-Therefore the neutron : proton ratio in $ 82^206Pb$ is 124 : 82 = 62 : 41.