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 ...

Maths questions might ask you to plot or complete a graph or table. When you draw a graph ... neutrons and electrons in this atom of phosphorus. The radius of an atom is 1 × 10-10 m.

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 ...

Rubidium is an alkali metal in group IA of the periodic table with atomic number 37 ... The electronic configuration of Rubidium is (Kr)(5s 1). Its atomic radius is 0.248 nm and the (+1) ionic radius ...