It is calculated like this:
(% of isotope x its mass) + (% of isotope x its mass) / 100
e.g for chlorine
75% of all chlorine has a mass of 35. 25% of all chlorine has a mass of 37.
(75 × 35) + (25 × 37)∕100
= 2625 + 925∕100
= 35.5
This blog will cover and explain the specification for Edexcel triple science course 2013 Chemistry. Hope it helps :)
(Different isotopes have different weights due to less or more protons.)
ReplyDeleteits not protons, its neutrons :P
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DeleteOh god! thank you :P
ReplyDeleteShouldn't it be 75% and 25%?
ReplyDeleteHaha, yes, thanks!
Deleteshouldnt it be 35.5
ReplyDeleteyep! 35.5 instead 35.3
DeleteCheers guys :)
Delete75% of all chlorine has a mass of 25% of all chlorine has a mass of 37. (makes no sense needs to be...)
ReplyDelete75% of all chlorine has a mass of 35. 25% of all chlorine has a mass of 37.
Thanks :)
DeleteSorry this post has been laced with mistakes, not sure what was going on when I wrote it ;P Thank you all for the help!
ReplyDeleteThis comment has been removed by the author.
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i love this blog thank you so much hannah you are my saviour
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ReplyDeleteThe Chemistry Syllabus has changed…
ReplyDeleteHere is a New blog for the 2017 Syllabus:
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