what do you think you know about physics, physics is the study of matter under the effect of energy, but does this includes solid states bodies, atoms at ground states, object at microscopic size or object moving faster than light? these and more is what prompt me to ask again what is physics?
how does the nucleus of an atom change after beta decay?
the
nucleus of the element loss a neutron and gain a protons, the atomic number
changes , new atom is created while he atomic mass remain unchanged. for
example
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