use ideas about electronic structure to explain differences in chemical properties. [6 marks] Group 1 of the periodic table contains the alkali metals lithium, sodium and potassium. The alkali ...

Arranged by Atomic Number: Elements are arranged in order of increasing atomic number (number of protons) across periods ...

SUNAYANA: In this first series, we’ll be looking at atomic structure ... These are all the elements with one electron in the outer shell of the atom. Lithium, sodium, potassium, rubidium and ...