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These elements are put together in several Groups in the periodic table. E.g all elements in Group 1 will have a distinct pattern in their chemical reactions and appearance but are very different to Group 2. This is due to their sub-atomic structures of which the basic structures will be discussed below.
The atom is made up of two basic 'sections'. One is the nucleus. The nucleus constitutes of two particles- protons which are positively charged and neutrons which have a neutral charge. The masses of both particles are almost the same. One would immediately think that the repulsive forces between the protons (similar charges repel) would break the nucleus apart...
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