The thing that led the birth of the nucleus was The atomic numbers.
Lead has more protons in the nucleus of its atoms compared to tin. Lead has 82 protons while tin has 50 protons in its nucleus.
82
The atomic number of tin is 50 and the atomic number of lead is 82. The atomic number tells the number of protons in the nucleus, so lead has more protons.
3 unlike the normal 2
When a neutron hits the nucleus, it can be absorbed by the nucleus, causing the nucleus to become unstable and possibly undergo radioactive decay. This process can lead to the release of energy, emission of radiation, or transmutation of the nucleus into a different element.
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A total of 82 electrons
An atom with a variable nucleus is an isotope. Isotopes are atoms of the same element that have different numbers of neutrons in their nucleus, which can lead to variations in atomic mass.
Take away 3 protons from the nucleus of lead and an appropriate number of neutrons (depending on isotope desired).
Teratogens
electrons moving in orbits about the nucleus
The number of protons in the atomic nucleus of lead is 82 whereas in gold it is 79