The periodic table’s arrangement also allows scientists to discern trends in element properties, including electronegativity, ionization energy, and atomic radius. Many scientists worked on the ...

Across a period from left to right, the covalent radius decreases. As you move from left to right across the periodic table, atoms have more electrons in their outer energy level and more protons ...

Potassium is an alkali metal in group IA of the periodic table with atomic number 19 ... The electronic configuration of Potassium is (Ar)(4s 1). Its atomic radius is 0.235 nm and the (+1) ionic ...

Sodium is an alkali metal in group IA of the periodic table with atomic number 11 ... The electronic configuration of Sodium is (Ne)(3s 1). Its atomic radius is 0.190 nm and the (+1) ionic radius is 0 ...