ممكن حل دي السؤالين
؟؟
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() the mass of one molecule of fluorine gas is about:
الحل :
2 في 19 على عدد افوجادرو ..,
من فين جات 2 ؟؟
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(11) 23na and 24mg both have the same
(a) number of neutrons.
(b) number of electrons.
(c) atomic number.
(d) mass number.