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?
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solve tl−207 (beta)
207 81Tl → ? + 0-1e
207 81Tl →20782Pb + 0-1e
for a beta decay , the atomic number will
increase by one and the nuclide will belead-207
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