Periodic Table

The distant past Aristotle (384-322 BC) was an ancient Greek philosophers who thought that everything was made up of just four elements: earth, water, air and fire. Antoine-Laurent de Lavoisier In 1789, a French chemist Antoine-Laurent de Lavoiser preoduced the first modern chemical textbook which he compiled the first list of elements; oxygen, nitrogen, hydrogen, phosphorus, […]

C1 1.2 intermolecular forces and bondings

Strength of bonds and forces Ionic and covalent bonds are strong, but the intermolecular force (forces between different molecules) are weak. There are three common types of intermolecular forces: -hydrogen bonds -permanent dipole-dipole forces -can set Waals’ forces Permanent dipole-dipole interactions Polar molecules (molecule that has an overall dipole across the bonds) have a permanent […]

Linus Pauling

Linus Pauling (1901-1994) was an American chemist, biochemist, peace activist and a educator who won the Novel Price twice – Novel Price in Chemistry (1954) and Novel Peace Price (1962) – for the first and last time, yet. Linus Pauling with his Novel Peace Prize Linus Pauling became a peace activist strongly influenced by his wife’s pacifism. He joined […]