Lecture 2 Outline - The Basics: Elements and Minerals...

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The Basics: Elements and Minerals Elements Fundamental unit of chemistry All matter can be described as either elements or compounds of elements 92 naturally occurring elements Thousands of compounds known. Almost limitless number. Atoms Atoms are the basic unit of elements. Smallest particles that have the characteristics of the element. Atoms for each element have a unique number of subatomic particles These determine the chemical properties of the element. Atoms The major subatomic particles that control chemical characteristics are protons , neutrons , and electrons Atoms The number of neutrons can change. Atoms of an element with different numbers of neutrons are isotopes. Isotopes all have different atomic weights. Some are stable Unstable isotopes decay and are radioactive . Decay is used in determining age or rocks Atoms The number of electrons can change. Bonding between atoms is through electron behavior Ions Ion: atom with an electron surplus or deficit ( charged atom).
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Lecture 2 Outline - The Basics: Elements and Minerals...

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