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boilng point of Rhubidium

So as you go down group 1 the melting point and boiling point decreases as the number of protons increases. But in my textbook the boiling point of rhubidum increases yet its melting point decreases, i was just wondering why this is.
Reply 1
Think you've read it wrong from potassium to rhubidum boiling point decreases. (Check Wikipedia)
Reply 2
Original post by soup
Think you've read it wrong from potassium to rhubidum boiling point decreases. (Check Wikipedia)


Yeah thats what i thought as well its a typo in my text book it says the b.p/ is 1326

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