userdata-paziras-Chem101-Chap_02A

208 82 p b p 0 n e 2 137 56 b a p 0 n

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Unformatted text preview: ical Charge Electrons Proton Neutron 0 1 1 –1 +1 0 · The nucleus has a positive charge (contains protons and neutrons) · The positive charge of the nucleus is referred to as NUCLEAR CHARGE and is abbreviated Z. · The NUCLEAR CHARGE can be determined experimentally and is equal to the number of protons and the number of electrons (in neutral atoms) · The mass of an atom is the sum of the masses of the protons and of the neutrons A = Mass Number = Number of protons + Number of neutrons 7 Chemistry 101 Chapter 2 ATOMIC STRUCTURE · Any nucleus is characterized by: Z = A = Nuclear Charge = number of protons Mass Number = number of protons + number of neutrons · A NUCLIDE, is an atom, characterized by: Ø a definite nuclear charge, Z (atomic number) Ø a definite Mass Number, A · Symbolic Representation of a Nuclide: A Z Sym bol 12 6 For example: A Carbon (C) nuclide: C (Z = 6 Examples: Determine the subatomic particles for the nuclides indicated below: 1. 208 82 P b + p = 0 n = – e = 2. 137 56 B a + p = 0 n = – e = 8 A= 12) C...
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This document was uploaded on 03/18/2014 for the course CHEM 101 at Los Angeles Mission College.

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