関連ワード:  why does radius decrease across a period    why does size decrease across a period    why does radius increase across a period    why does radius decrease down a period    why does atomic radius decrease across a period    why does ionic radius decrease across a period    why does atomic radius decrease across a period from left to right    why does covalent radius decrease across a period    why does atomic radius decrease across a period simple    why does atomic radius decrease across a period 3  
結果 : why does radius decrease across a period