Interactive periodic table with element scarcity (SRI), discovery dates, melting and boiling points, group, block and period information.

A great Starter for ten activity to engage your students with trends in the periodic table by focusing on group 2, group 3 and group 7.

Chlorine has a major role to play in synthetic organic chemistry, taking part in three of the most common reaction mechanisms. In the first of these, the photochemical substitution reaction, chlorine reacts with an alkane by replacing one of the hydrogen atoms attached to a carbon forming a chloroalkane.

Elements and Periodic Table History Iron objects have been found in Egypt dating from around 3500 BC. They contain about 7.5% nickel, which indicates that they were of meteoric origin.

The three crowns represent the three major forms of the element in nature and carbon’s status as ‘King of the Elements’ in the periodic table.

Why silicon? Well, it is often said that elements close to each other in the periodic table share similar properties and so, seduced by the age-old red herring that "carbon is the element of life", the writers selected the element below it, silicon.

Hydrogen is an essential for life, the universe and just about everything. Life, in fact, is multiply dependent on it. Without hydrogen we wouldn't have the Sun to give us heat and light. There would be no useful organic compounds to form the building blocks of life. And that most essential substance for life's existence, water, would not exist.

Elements and Periodic Table History The Polish chemist Jedrzej Sniadecki was investigating platinum ores from South America and, in May 1808, when he discovered a new metal which he called it vestium.

It's classified in the periodic table as an alkaline earth metal - the heaviest of the series - putting it alongside more familiar metals like magnesium and calcium. With atomic number 88, it has four natural isotopes of atomic weight 228, 226, 224 and 223 - though there are a remarkable 21 more artificial isotopes.

Core element in organic compounds (fats, proteins, carbohydrates, vitamins). • H + gives one of the five basic tastes – sour. • the higher the concentration of H +, the lower the pH • pH 2 Lemon juice (very sour) • pH 3 Apple (sour) • pH 5 Meat (not sour) • pH 7 Tea or water (not sour) • Hydrogen-bonds, one of the strongest forms of