Portfolio_Group_05

//__Dalton’s atomic theory__//

 * all matter is made up of tiny indivisible particles called atom
 * atoms of the same element are identical, those of different atoms are different

//__Neil Bohr model of the atom__//

 * the electrons revolve around the nucleus in fixed circular paths known as the orbits
 * they travel indefinitely within an energy level without loosing energy
 * every orbit has an exact energy
 * the orbits further away from the nucleus have higher energy
 * electrons in lower orbit absorb energy and move to a higher orbit, these are known as excited electrons
 * excited state electrons can come to the ground state by releasing the extra energy that they possess

__//Werner Heisenberg’s Wave Mechanical model of the atom//__

 * based on Uncertainty principle or probability of locating an electron
 * leads to the notion of orbitals
 * the different orbitals are s, p, d, and f
 * every electron has a quantum address by which it can be identified, known as quantum number
 * there are 4 quantum numbers in total: n, l, m, and s

**Chapter 02**
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Chapter 03
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