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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a certain element forms an ion with 54 electrons and a charge of +2. identify the element.
For
an atom to have a charge of +2 it must lost 2 electrons,therefore the neutral atom has54+ 2 electrons =56 electrons.
in a neutral atom , the atomic number is same as
the number of electrons, therefore the element is barium
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