based on molecular Orbital theory, the number of atomic orbitals used will equal to the number of mole cular orbitals formed. • tlectrocyclic reaction will occur when lobes of opposite phases of the orbitals overlap to formed a bond resulting in a symmetry aowed process The reaction below will form 3 brominated pro ducts chs -Br

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Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.