01 Notes - Types of Elements

01 Notes - Types of Elements - thin sheets Conduct heat and...

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Pluchino – Regents Chemistry Periodic Table and Trends – 01 Types of Elements Aim: How are elements organized? Do Now: What collections do you have? How are they organized? Periods: Horizontal rows across the periodic table Groups (families): Vertical columns in the periodic table. Why do elements in the same group have similar properties? VALENCE ELECTRONS! Same number of valence electrons…similar properties… Metals: to the left of the staircase Nonmetals: to the right of the staircase Metalloids: sit above or below the staircase Not everything touching the staircase is a metalloid!!! Metals Non-Metals Semi-Metals/Metalloids Ductile – roll into wires Brittle – break easily Have some properties of metals and some properties of non-metals Malleable – flatten out into
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Unformatted text preview: thin sheets Conduct heat and electricity Poor conductors of heat and electricity Can be used as semi-conductors for computer technology Shiny luster Lacks luster Depends on the element Tend to lose electrons and become cations Tend to gain electrons and become anions Can either gain or lose electrons depending on environment Make up 2/3 of the periodic table S, P, O, N, C, H, Se, Group 17 and group 18 B, Si, Ge, As, Sb, Te, (along the staircase) Transition metals (groups 3-12) are known for making brightly colored compounds… Conclusions: The periodic table is arranged in periods and groups Elements in the same group have the same number of valance electrons and same properties Based on where an element is located, its properties can be predicted...
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