The atom having the smallest size
fnazneen2d:
The smallest is the hydrogen atom with one proton and one electron.
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Helium is the atom having the smallest size.
The force between the two protons and two electrons pull the electron shell closer than the lone electron and lone proton in a Hydrogen atom.
This is why atomic radius decrease from left to right in each row of the periodic table whereas the atomic number and atomic weight go up. The atomic radius gets smaller because the electron orbit fills up to form an octet and for each of the additional electron, a proton is added to the nucleus, pulling all the electron shells closer around the nucleus.
The force between the two protons and two electrons pull the electron shell closer than the lone electron and lone proton in a Hydrogen atom.
This is why atomic radius decrease from left to right in each row of the periodic table whereas the atomic number and atomic weight go up. The atomic radius gets smaller because the electron orbit fills up to form an octet and for each of the additional electron, a proton is added to the nucleus, pulling all the electron shells closer around the nucleus.
hydrogen is also there
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Answer:
Hydroge ,Nitrogen,it move with periodic table
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