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The size of atomic radius increases down the group but decreases from left to right across the period. Atomic radius is defined by the distance of protons in nucleus to surrounding electron shells. Mainly...

As you go down the group:shielding increases as electron numbers increase, this means that the distance between the nucleus and outer electron is further and attraction is weaker between the positive nucl...

Acidified Potassium Manganate(VII).  Propanoic acid (which is a carboxylic acid) can be made by oxidising propanol (which is an alcohol). In this case, oxidation involves adding an oxygen atom and removin...

All group 1 elements have 1 electron in their outer shell, making this the electron that is involved in reactions. As you move down a group in the periodic table the number of shells increases, which mean...

Barium has one more proton than caesium. The outer electrons of both elements are in the same shell so they feel the same shielding effect. However, as barium has one more proton, barium's outer electrons...