tailieunhanh - Types of Atomic & Molecular Bonds

Greek philosopher Empedocles (500 BC) suggested that chemical changes are caused by an emotional likes and dislikes. The love between two substances will make them unite and form a third substance. On the other hand, if the substances start to had each other they will decompose. | Types of Atomic I Molecular Bonds Objectives of the class Develop a sense of history of scientific thinking Explain the types of bonds You should be able to have develop a feeling for the mechanical properties based on the type of bond Greek philosopher Leucippus used the word atom which means indivisible 400 BC Lots of work done by the alchemists Lavoisier chemical reaction leads to no net loss or gain of matter. Dalton concept of atomic mass 1808 Mendelev periodic table of elements 1869 Moseley showed that the number of electrons number of protons atomic number

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