We subtract the enthalpies of the reactants from that of the products:
Since this is < 0, this is an exothermic reaction.
Since this is < 0, this is an exothermic reaction.
Each year as the weather gets cold, gray whales swim over 10.000 miles from arctic waters south to coastal areas of
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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