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 ...

Aluminum is a metal in group IIIA of the periodic table with atomic number 13 ... The electronic configuration of Aluminum is (Ne)(3s) 2 (3p) 1, and it has an atomic radius of 0.143 nm. At room ...

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 ...

The radius of the nucleus of this atom is 1 × 10-14 m. Calculate how many times smaller the radius of the nucleus is than the radius of the atom. [2 marks] ...

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 ...