The Atom - atom is located in the nucleus The light...

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The Atom Atomic Structure An  atom  is composed of three types of subatomic particles: the  proton neutron and  electron . Particle Mass (g) Charge Proton 1.6727 x 10 -24 +1 Neutron 1.6750 x 10 -24 0 Electron 9.110 x 10 -28 -1 Here, charge is given in multiple of 1.602 x10  -19  coulombs. Protrons  and  neutrons  have similar masses and  electrons  are much lighter (over 1,000  times lighter). Protons  and  electrons  have equal and opposite charges while  neutrons  have no charge. We have the following simple picture of the  atom . The atom is comprised of a positively charged nucleus composed of protons and  neutrons. This small nucleus is surrounded by orbiting electrons. Because the protons  and neutrons are so much more massive than the electrons, virtually all the mass of the 
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Unformatted text preview: atom is located in the nucleus . The light negatively charged electrons move around in an orbit in the space around the nucleus. We use the following symbol to describe the atom: A= Z + N, where N is the number of neutrons. If you add or subtract a proton from the nucleus, you create a new element . If you add or subtract a neutron from the nucleus, you create a new isotope of the same element you started with. In a neutral atom, the number of positively charged protons in the nucleus is equal to the number of orbiting electrons ....
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This note was uploaded on 11/22/2011 for the course CHEMISTRY CHM1025 taught by Professor Laurachoudry during the Fall '10 term at Broward College.

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The Atom - atom is located in the nucleus The light...

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