The most obvious piece of equipment a receptionist uses is a telephone, but there is a lot of variety in types and styles, from phone systems with a few lines to switchboards with multiple lines.
Modern Atomic Theory Bohr's model of the atom is important because it introduced the concept of the quantum in explaining atomic properties. However, Bohr's model ultimately needed revision becuase it failed to explain the natue of atoms more complicated than hydrogen.rwin Schrodinger developed the equation which is used today to understand atoms and molecules-the Schrodinger Equation (1926) Erwin Schrodinger took the ideas developed by de Broglie, Heisenberg and others and put them together in a single equation that is named after him.
One model of the atom states that instead of electrons being tiny particles in orbits, they are in the form of an electron cloud in shells around the nucleus.This model is due to the Uncertainty Principle and is useful in Quantum Mechanics.he Bohr model or solar system model of the atom is that the atom is like a tiny solar system, with the nucleus in the center and electrons rotating around the nucleus in orbits, similar to how the planets rotate around the Sun.