Lecture3 - Lecture #3 Earths and Physical Systems...

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Lecture #3 Earths and Physical Systems Chemistry- studies types of matter along with how they interact Matter- all material in the universe that has mass and occupies space • The Law Of Conservation of Matter - matter can be transformed from one type of substance into others but it cannot be destroyed • Atoms - the smallest components that maintain an element’s chemical properties • The nucleus (center) contains protons & neutrons (positively charged • Atomic # - the number of protons • Electrons are negatively charged particles surrounding the nucleus Elements - a fundamental type of matter • A chemical substance with a given set of properties Isotopes - atoms of the same element with different numbers of neutrons • Isotopes of an element behave differently • Mass # - the combined number of protons and neutrons • Atoms that gain or lose electrons become electronically charged ions • Radioactive Decay of Isotopes • Radioactive isotopes decay until they become non radio active stable isotopes • emit high-energy radiation • Half-life - the amount of time it takes for one-half of the atoms to give off radiation and decay • Different isotopes have different half-lives ranging from fractions of a
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This note was uploaded on 01/11/2012 for the course ES 101 taught by Professor Staff during the Fall '11 term at Rutgers.

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Lecture3 - Lecture #3 Earths and Physical Systems...

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