Chemistry Intro Web - Matter and Energy Matteranything that...

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Matter and Energy Matter—anything that has mass (weight, stuff) Energy—the ability to move stuff (i.e. do work)
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Organization of Matter Elements—fundamental types of matter 96% of your body = four elements Carbon (C) Oxygen (O) Hydrogen (H) Nitrogen (N)
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Smallest elements = atoms Protons (p + ) Neutrons (n 0 ) Electrons (e - ) Figure 2.1
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Atomic Structure of Smallest Atoms Figure 2.2
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Elements = atoms Atomic number—number of protons defines each element Example: an atom with 6 protons = carbon, 8 protons = oxygen Atomic mass number—protons + neutrons
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Atomic number and Atomic Mass Number Atomic number = # of protons Atomic Mass number = protons + neutrons 6=atomic # 12=atomic mass # 11=atomic # 23=atomic mass # 1=atomic # 1=atomic mass # 8=atomic # 16=atomic mass #
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Isotopes and Atomic Weight Isotopes Have the same number of protons Vary in number of neutrons Figure 2.3
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Isotopes = same atomic number, different atomic mass number Figure 2.3 Atomic number = # of protons Atomic Mass number = protons + neutrons 1=atomic number 1=atomic mass number 1=atomic number 2=atomic mass number 1=atomic number 3=atomic mass number
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Radioactivity Radioisotope Unstable isotopes decay Radioactivity—process of spontaneous atomic decay
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This note was uploaded on 01/13/2012 for the course ANATOMY 10 taught by Professor Prestongalusky during the Fall '11 term at Riverside Community College.

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Chemistry Intro Web - Matter and Energy Matteranything that...

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