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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how many protons in an atom with 86 electrons and a 222 mass number.
for the mass number 222, for a neutral atom , the number of electron and
proton are equal, therefore , the number of protons is also 86.
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