CHEMISTRY: Chapter 6
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38 terms
Terms | Definitions |
|---|---|
 Metals | Good conductors of heat and electric current |
| Period | Horizontal rows on the Periodic Table |
| Group | Family, Vertical row |
| Non-metals | Poor conductors of heat, electric current, high shine, flexbility |
| Metalloids | Have properties of metals and nonmetals |
| Group 1A | Alkaline Metals |
| Group 2A | Alkaline Earth Metals |
| Group 7A | Halogens |
| Group 8A | Nobel Gases |
| Transition Metals | Middle Elements |
| Inner Transition Metals | Removed Middle Elements |
| Representative Elements | Elements that display a wide range of physical and chemical properties |
| Atomic Radius | one half of the distance between the nuclei of two atoms of the same element when atoms are joined. No shell. |
| 7 Metalloids | B, Si, Ge, As, Sb, Te, At |
| Mendeleev arranged the PT | By Atomic Mass |
| Periodic Law | Elements arranged in order of increasing atomic number. there is a periodic repetition of their physical & chemical properties |
| Three Broad Classes | Metals, Non-metals, and Metalloids |
| Boron Family | 3A |
| Carbon Family | 4A |
| Nitrogen Family | 5A |
| Oxygen Family | 6A |
| Cation | Lost an electron and became positive |
| Anion | Negative ion when electron is added |
| Ions | Group of atoms that have a positive or negative charge |
| Ionization Energy | Energy required to remove an electron from an electron |
| Across a Period | Decreases (Atomic Size) |
| Down a group | Increases (Atomic Size) |
| across a Period | Increases (Ionization energy) |
| Down a group | Decreases (Ionization energy) |
| Across a Period | Increases (Electronegativity) |
| Down a Group | Decreases (Electronegativity) |
| Down a Group | Increases (Ionic Size) |
| Left of the Staircase | Metals (location) |
| Right of the Staircase | Non-Metals (location) |
| Positive and negative ions | form when electrons are transferred between atoms |
| Metals tend to | lose electrons, Cations |
| Larger than atoms | which they form, Anions |
| Electronegativity | ability of an atom of an element to attract electrons when the atom is in a compound |
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