Chemistry ch. 6
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34 terms
Terms | Definitions |
|---|---|
 alkali metals | What kind of metals are the Group 1 metals? |
| group 1 alkali metals | Which elements are the most chemically reactive? |
| alkaline earth metals | What kind of metals are the Group 2 metals? |
| rare earth metals | What is another name for the transition metals? |
| anion | What is an ion with a negative charge called? |
| cation | What is an ion with a positive charge called? |
| atomic radius | Definition: Half the distance between the nuclei of two atoms of the same element. |
| electronegativity | Definiton: The ability of an atom of an elemnt to attract electrons when the atom is in a compound |
| periodic law | Definiton: When elements are arranged in order of increasing atomic number, there is a periodic repetition of their physcial and chemical properties. |
| chemical | Elements in the same GROUP share what kind of properties? |
| physical | Elements in the same PERIOD share what kind of properties |
| metal | Definition: An element that is solid at room temperature, a good conductor of heat and electricity, and generally is shiny; ductile and malleable |
| nonmetal | Definition: An element that is a poor conductor of heat and electricity |
| metalloid | Definition: An element that has some characteristics of metals and some characteristics of nonmetals |
| halogen | Definition: one of the elements of Group 17 of the periodic table (fluorine, chlorine, bromine, iodine, and astatine); combines with most metals to form salts |
| noble gas | Defintion: One of the elements of Group 18 of the periodic table (helium, neon, argon, krypton, xenon, and radon) |
| representative element | Defintion: |
| transition metal | Defintion: |
| inner transition metals | Defintion: |
| ion | Definition: |
| ionization energy | Definition: |
| their properties | What did early chemists sort elements by? |
| increasing atomic mass | How did Mendeleev arrange the elements on his periodic table? |
| increasing atomic number | How are elements sorted on the Modern Periodic Table? |
| increases, decreases | How does atomic mass, size change from top to bottom? Left to Right? |
| transfer of electrons between atoms | What causes an ion to form? |
| decreases, increases | How does electronegativity change from top to bottom? Left to Right? |
| undiscovered elements | What did Medeleev leave space in his periodic table for? |
| it was more accepted (because the predicted properties were correct) | What effect did the discovery of GALLIUM have on the acceptance of Mendeleev's periodic table? |
| periodic repetition of physical and chemical properties | What pattern is revealed when the elements are arranged by increasing atomic number? |
| conducts heat and electricity luster solid at room temp (except Hg) ductile malleable | What are the 5 properties of a metal? |
| behavior depends on conditions | How is a metalloid different than a metal or nonmetal? |
| 1A to 7A | Representative Elements include which 7 groups? |
| because it has a filled outer ring | Why are noble gases unreactive? |
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