Answers

2016-02-28T20:43:22+05:30
No it can't be possible because atomic numbers of elements are always n whole numbers.

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2016-02-28T20:49:46+05:30
" the atomic number of any of the element should only be a whole number "
example -
1. Boron : It's atomic number is 5
2. Argon : it's atomic number is 18 

∴ it is impossible to have an element with a atomic number 1.5 which is to be placed in between Hydrogen and Helium
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