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Why Are The Periodic Tables Important?
No, not a homework question! Just in a long and varied education and life I’ve never really understood the importance or relevance of The Tables.
So, a simple explanation please.
BillB
So, a simple explanation please.
BillB
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I've bookmarked this thread as at first reading I have already got a clearer idea of the table - I abandoned sciences quite early and maybe after reading the explanations a few more times I'll be better informed.
I tend only to refer to them now when they appear in a crossword clue for example.
Sorry for digressing.
I tend only to refer to them now when they appear in a crossword clue for example.
Sorry for digressing.
erm sorry boys
The Geiger Marsden experiment - which caused a sensation
first showed that the atom was mainly er air
https:/
alpha particle at v thin gold foil mainly went straight thro
but some went back where they came ( those near the charged nucleus)
was completely incompatible with the plum pudding model
( atom as a plum pud with +ve and -ve particle dotted around) which was current ( pun intended!) at the time
this showed instead very highly charged small =ve centres.
Rutherford then postulated that the electrons whizzed around the positive nucleus - along with Bohr
( everyone else said no that cant be - we KNOW that if an electron moves in a circle then it MUST emit radiation ( and so lose energy)
Bohr later said - you have no idea - there was no one else working in this field - they all thought we HAD to be wrong.
The Geiger Marsden experiment - which caused a sensation
first showed that the atom was mainly er air
https:/
alpha particle at v thin gold foil mainly went straight thro
but some went back where they came ( those near the charged nucleus)
was completely incompatible with the plum pudding model
( atom as a plum pud with +ve and -ve particle dotted around) which was current ( pun intended!) at the time
this showed instead very highly charged small =ve centres.
Rutherford then postulated that the electrons whizzed around the positive nucleus - along with Bohr
( everyone else said no that cant be - we KNOW that if an electron moves in a circle then it MUST emit radiation ( and so lose energy)
Bohr later said - you have no idea - there was no one else working in this field - they all thought we HAD to be wrong.
I don't see the harm in answering questions, whatever the motivation may be for asking them. Either the questioner learns something, or others who would also have asked the question learn something -- and, quite often, even when answering you learn something.
On the other hand, snide comments of the sort this thread was full of advance nothing.
On the other hand, snide comments of the sort this thread was full of advance nothing.
// Giving simple answers to simpletons.//
um no a lot of the usual suspects had fun over engineering thermodynamics earlier on in the evening
I fell less in luuurve with the geiger model as one of the exercises was to estimate from the proportion of direct returns, how big the nucleus would be.
match head in a football field with the first electron at the boundary I think .....
um no a lot of the usual suspects had fun over engineering thermodynamics earlier on in the evening
I fell less in luuurve with the geiger model as one of the exercises was to estimate from the proportion of direct returns, how big the nucleus would be.
match head in a football field with the first electron at the boundary I think .....
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