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Jan 28, 2017 at 16:00 history bounty ended Harsh Kumar
Jan 20, 2017 at 9:31 vote accept Harsh Kumar
Jan 20, 2017 at 5:18 history edited ringo CC BY-SA 3.0
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Jan 19, 2017 at 19:52 comment added MaxW Also I's point out that (1) Neutrons confounded the relationship between atomic number and atomic mass as chemistry was being understood as a science. (2) In general the mass of different isotopes has a very small effect on chemical reactivity.
Jan 19, 2017 at 15:24 history edited ringo CC BY-SA 3.0
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Jan 19, 2017 at 8:26 history edited orthocresol CC BY-SA 3.0
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Jan 19, 2017 at 5:30 history answered ringo CC BY-SA 3.0