What is the force that accelerates objects towards Earth?
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The mass number is the summation of number of proton and neutron present in a nucleus of an atom. For the neutral atom the number of positive charge (number of proton) must be equal to the number of electrons. The number of electrons present in an atom is the atomic number of the atom. The standard way to express the mass number (a) and atomic number (m) of a atom (say X) is . Now for silicon number of electron or atomic number is 14. And the mass number (a) given 29. Thus the expression nucleus of silicon will be
Robinson Annulation reaction is mainly done for the synthesis of six membered rings. This reaction is the combination of two reactions 1). Michael Addition Reaction and 2). Aldole Condensation.
The synthesis of <span>desoxy-19-nortestosterone by Robinson Annulation is shown below,</span>
The synthesis of <span>desoxy-19-nortestosterone by Robinson Annulation is shown below,</span>