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Explain why the nucleus of an atom is positively charged but the overall charge of an atom is neutral
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A__ is two or more substances that are together in the same place but are not chemically combined
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The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.
Answers: 3
Explain why the nucleus of an atom is positively charged but the overall charge of an atom is neutra...
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