What Is Matter? Matter is anything that has mass and occupies space — stones, trees, chairs, dust and chalk are […]

Matter can be divided into living matter (which meets all the characteristics of life — plants and animals, studied in […]

The Laboratory A laboratory is a special room where scientists carry out experiments and research, and where chemicals and equipment […]

Science and Its Branches Science is the systematic, orderly study of nature — the world around us — and a […]

Key Definitions Standard solution: a solution of precisely known concentration (e.g. “1M NaOH solution”). Molar solution: a solution containing exactly […]

Position and General Properties Transition metals occupy the block between Group II and Group III, from period 4 onward (scandium […]

The Elements Beryllium, magnesium, calcium, strontium, barium and radium make up Group II. Each has two valence electrons and a […]

The Elements Lithium, sodium, potassium, rubidium, caesium and francium make up Group I — the alkali metals, named for the […]

Acid – Base Theories Various theories have been proposed to define acids and bases some of which include: a) Arrhenius […]

What Redox Means Oxidation and reduction always happen together — one cannot occur without the other, which is why they’re […]