stevemangles Posted July 30, 2004 Share Posted July 30, 2004 Anyone know the radius of Hydrogen and the Helium Ion He+...that is with only one electron and using the Bohr atom Link to comment Share on other sites More sharing options...
budullewraagh Posted July 30, 2004 Share Posted July 30, 2004 yep, here you are; H- 154 pm H 78 pm H+ 10^-5 pm covalent 30 pm van der Waals 120 pm He 128 pm van der Waals 122 pm He+1 0.93 A...i dont have a key that can type the A with the little circle above it. Link to comment Share on other sites More sharing options...
budullewraagh Posted July 30, 2004 Share Posted July 30, 2004 furthering my previous post, the reason why He+1 has a lesser atomic radius than H+ is because its effective nuclear charge is greater, because it has more protons "pulling" the electrons. Link to comment Share on other sites More sharing options...
swansont Posted July 30, 2004 Share Posted July 30, 2004 yep' date=' here you are;H- 154 pm H 78 pm H+ 10^-5 pm covalent 30 pm van der Waals 120 pm He 128 pm van der Waals 122 pm He+1 0.93 A...i dont have a key that can type the A with the little circle above it.[/quote'] 78 pm for H sounds like the average value, because the most probable value should be the Bohr radius, which is 52.9 pm. Link to comment Share on other sites More sharing options...
wolfson Posted July 30, 2004 Share Posted July 30, 2004 The norm H =37.1 pm The norm He(1+) = 31 pm Link to comment Share on other sites More sharing options...
budullewraagh Posted July 30, 2004 Share Posted July 30, 2004 that doesn't sound accurate Link to comment Share on other sites More sharing options...
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