Tuesday, March 4, 2008




In class, we learned about the periodic table and the atom. As many might know, the periodic table is a method of displaying all the elements known to man kind. The periodic table was first designed by the Russian chemistry professor Dmitri Ivanovich Mendeleev and then four months later the German Julius Lothar Meyer, who both arranged the elements by mass. The table is made up of squares, each square belongs to an element.
If you look at the one pictured above, you can see how the square describes an element. There is an atomic number, that tells you how many electrons and protons are in the atom. There is the atomic symbol (H) which is obviously the symbol for the element (Hydrogen). And lastly, there is an atomic mass, which is represented in atomic mass units.

To better understand the periodic table you need to understand the make up of an atom. The atom is made out of four main parts: the electron, proton, neutron, and shell. Since all atoms are neutral charged, the number of negatively charged electrons and the number of positively charged electrons must be the same. The protons and neutrons are found in the nucleus of the atom while the electrons orbit the nucleus. See above for photo.

I think that learning about this is a fundamental way to start learning and exploring different aspects of biology, chemistry and physics.

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