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Periodic Table
| Term | Definition |
|---|---|
| Periodic Table | Arranges all of the known elements in order of increasing atomic # (# of protons) |
| Metals | Becomes solid at room temperature (except mercury), ductile, malleable, conductor, high density, high melting point |
| Reactivity | Those metals at the bottom left corner of the periodic table are the most reactive, changes across to periodic table |
| Non-Metals | Dull, poor conductor, brittle, low density, low melting point, less reactive than metals |
| Metalloids | Elements on both sides of the zigzag line (staircase) have properties of both metals & nonmetals |
| Periods | Rows numbered from 1-7, Atomic # increases left-right, those in the same period have the same # of energy levels, chemical properties are not all similar |
| Groups | Aka families are the columns numbered 1-18, same # of valence electrons, chemical properties are very similar, group 1 (most reactive) & group 18 (most inert, aka stable) |
| Chemical Reaction | The ability of atoms to combine or separate w/ others to create substances, valence electrons are key to this |
| Stable Atom | Outer shell filled, don't want to bond w/ other atoms (inert) |
| Alkali Metals | Highly reactive, always combined, very soft |
| Alkaline Earth Metals | Always combined, not as reactive as Alkaline metals, important minerals for our body |
| Transition Metals | Less reactive, hard, useful building materials, jewelry, & coins, useful as oxides to make paint & pigments |
| Nobel Gases | Nonreactive, always found alone, used in balloons, light bulbs & neon signs |
Created by:
ambrrr
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