important questions for SA2 science exam class 9
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The avg atomic mass of a sample of an element X is 16.2 u. What are the percentages of isotopes 16X8 and 18X8
in the sample?
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what are the chapters important in sa2 for class -9
i 'm a teacher and i want to teach my students with those questions for preparing them for exam
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i am a student . please send me some sample papers for sa 2
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