- #1
Meduza
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i know the rules of increasing and decreasing atom sizes down and across the periodic table.
however, i have met one strange thing when i was given data to plot a graph.
the hydrogen atom radius was stated as 32 pm, but helium was 50 pm. when i searched the internet, i found few websites that state radius of helium 31, but one of them stated it as 128 pm!
why is that?
had someone made a mistake?
http://periodic.lanl.gov/elements/2.html
however, i have met one strange thing when i was given data to plot a graph.
the hydrogen atom radius was stated as 32 pm, but helium was 50 pm. when i searched the internet, i found few websites that state radius of helium 31, but one of them stated it as 128 pm!
why is that?
had someone made a mistake?
http://periodic.lanl.gov/elements/2.html
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