L7-Matter%2C+Energy+and+Resources

L7-Matter%2C+Energy+and+Resources - Principles of Ecology:...

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Unformatted text preview: Principles of Ecology: Matter & Energy in the Environment Chapter 2 Outline s Principles of Matter and Energy s Building Blocks of Life s Chemical Bonds s Acids and Bases s Energy flow: First & Second Law of Energy PRINCIPLES OF MATTER AND ENERGY s Matter - Has mass and takes up space. s Three phases s Solid s Liquid s Gas s Law of Conservation of Matter s Under normal conditions, matter cannot be created or destroyed. Matter: structures, and quality s Matter: s Elements (distinctive building blocks of matter that make up every material substance) s Compounds: > different elements held together by chemical bonds s Ionic compounds: made of oppositely charged ions s Covalent/molecular compound: made of molecules of uncharged atoms (water made of H and O)—covalent bonds s # of elements: 115 known (92 naturally occur/23 synthesized): hydrogen (H)…. Periodic table of the elements Elements and compounds Building blocks of elements s Atom - Smallest particle that exhibits the characteristics of an element: made of s Protons- positively charged. (in nucleus) s Neutrons - Uncharged (in nucleus) s Electrons - Negatively charged (outside the nucleus) s Atomic number: = number of protons s Mass number: = number of protons + number of neutrons Carbon-12 Atom Building Blocks of Life s Isotope- Atoms of a single element that differ in atomic mass. s Radioactive isotopes spontaneously decay or shed subatomic particles. s Half Life s Neutrons s Alpha, Beta, Gamma particles s Positrons Building Blocks of Life s Ions s Electrically charged atoms or combinations of atoms s Cations – positive charge s Anion – negative charge....
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L7-Matter%2C+Energy+and+Resources - Principles of Ecology:...

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