Atoms Isotopes and Ions Copyright 2010 by Darrell
Atoms, Isotopes and Ions Copyright © 2010 by Darrell Causey, Jr.
The Atom • Mostly space • Very small dense nucleus • Protons (e+) • Neutrons (e 0) • Electrons (e-) Copyright © 2010 by Darrell Causey, Jr.
Periodic Table Info • Name • Symbol • Atomic Mass • Atomic Number Copyright © 2010 by Darrell Causey, Jr.
Nuclear Symbols mass number 40 20 Ca +2 charge atomic number Copyright © 2010 by Darrell Causey, Jr.
Stable Atom A stable atom has no charge. 40 Ca 20 no charge Copyright © 2010 by Darrell Causey, Jr.
Atomic Number The number of protons in the nucleus. 40 atomic number Ca 20 Copyright © 2010 by Darrell Causey, Jr.
Mass Number The sum of the protons and neutrons. mass number 40 Ca 20 Copyright © 2010 by Darrell Causey, Jr.
Isotopes Atoms of the same element but with a different number of neutrons 40 Ca 41 Ca 39 Ca Copyright © 2010 by Darrell Causey, Jr.
Ions An atom that has a charge because it gained or lost electrons. Copyright © 2010 by Darrell Causey, Jr.
Remember An electron is negative. e Copyright © 2010 by Darrell Causey, Jr.
So … An ion that loses electrons is positive and called a … Cation Copyright © 2010 by Darrell Causey, Jr.
And … An ion that gains electrons is negative and called an … Anion Copyright © 2010 by Darrell Causey, Jr.
Questions? Copyright © 2010 by Darrell Causey, Jr.
Nuclear Symbol Practice Copyright © 2010 by Darrell Causey, Jr.
How many … 23 11 protons neutrons electrons Na + cation 11 12 10 Copyright © 2010 by Darrell Causey, Jr.
How many … 16 8 protons neutrons electrons O 2 - anion 8 8 10 Copyright © 2010 by Darrell Causey, Jr.
How many … 35 17 protons neutrons electrons Cl - anion 17 18 18 Copyright © 2010 by Darrell Causey, Jr.
How many … 14 6 protons neutrons electrons C atom 6 8 6 Copyright © 2010 by Darrell Causey, Jr.
How many … 1 1 protons neutrons electrons H + cation 1 0 0 Copyright © 2010 by Darrell Causey, Jr.
How many … 2 1 protons neutrons electrons H + cation 1 1 0 Copyright © 2010 by Darrell Causey, Jr.
Questions? Copyright © 2010 by Darrell Causey, Jr.
Check out … www. mrcausey. com For more information. Copyright © 2010 by Darrell Causey, Jr.
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