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chem ch 5
| Term | Definition |
|---|---|
| elements arranged vertically | groups |
| elements arranged horizontally | periods |
| the length of each period is determined by | the # of electrons that can occupy the sub levels (blocks) being filled in that period |
| elements in group 1 are called | alkali metals |
| describe the alkali metals | slivery appearance, soft enough to cut w a knife |
| elements in group 2 are called | alkaline-earth metals |
| describe alkaline-earth metals | less reactive than alkali metals, too reactive to be found in nature in pure form |
| hydrogens configuration | 1s1 |
| does not share the same properties as the rest of the elements of group 1, is a unique element | hydrogen |
| helium configuration and group | ns2, part of group 18 |
| helium possesses special chemical stability just like noble gasses...since | its highest occupied energy level is filled by TWO eLeCtRoNS |
| 3d sublevel is ______ in energy than 4s sub level | HIGHER |
| the d block elements are metals with typical metallic properties and are referred as | TRANSITION ELEMENTS |
| groups 13-18 are which block elements | p block elements (except helium) |
| p block elements + s block elements = | main group elements |
| do the properties of the p block elements vary | YES |
| hydrogen and helium are the only ______ NOT in the p block | NONMETALS |
| the six metalloids are in what block | P BLOCK |
| left hand side, bottom of block there are | eighttttt p block metals |
| group 17 is called | halogens |
| which elements are the most reactive NONmetals | halogens |
| the metalloids or semiconducting elements are located between _______ and ________ in the P BLOCK | metals and nonmetals |
| the metals of the p block are | harder and denser than s block alkaline earth metals |
| the metals of the p block are | softer and less dense than the d block metals |
| atoms are _________ the farther to the _____ they are found across a PERIOD | smaller, right |
| smaller atoms across a period is bc | the increasing positive charge of the nucleus, which attracts electrons towards the nucleus |
| atoms get ______ the further _______ in a GROUP | larger, down |
| of the elements magnesium, chlorine, sodium, and phosphorus, which has the largest atomic radius | phosphorus |
| what element has the largest atomic radius | sodium |
| atomic radii _____ across a period | decrease |
| f block elements are wedged in-between groups ___ and ___ in the sixth and seventh periods | 3, 4 |
| f blocks elements position reflects that they involve the filling of the ____ sublevel | 4f |
| the first row of the f block is called | lanthanides |
| lanthanides characterstics: | shiny metals, similar in reactivity to group 2 alkaline metals |
| the second row of the f block is called | actinides |
| are the actinides radioactive?? | YES |
| atomic radius is _______ the distance between the _____ of identical atoms that are bounded together | one-half, nuclei |
| chemical compounds form because electrons are ______, _____ or ______ between atoms | lost, gained, shared |
| electrons available to be lost, gained, or shared in the formation of chemical compounds are called | valance electrons |
| valence electrons _____ atoms _____ in chemical compounds | hold, together |
| measure of the ability of an atom in a chemical compound to attract electrons from another atom in the compound | electronegativity |
| electronegativites tend to ____ across periods and ______ or remain the same down a group | increase, decrease |
| who noticed that elements arranged in order of increasing atomic mass had similarities in their chemical properties appear at regular intervals | Mendeleev |
| repeating patterns are referred to as | periodic |
| who created the periodic table of elements | Mendeleev |
| Mendeleev predicted the existence and properties of elements that would fill ____ of the spaces | 3 |
| who discovered that elements fit into patterns Bette when they were arranged according to atomic ##### | moseleyyyy |
| properties of elements will repeat at regular intervals based on the elements atomic #'s | The Periodic Law |
| what sublevel and group is the transition metals in | d sublevel, 3-12 |
| metalloids range from groups | 13-17 |
| what group are the noble gases in | group 18 |
| Ionization energy and electron affinity and electronegativity generally _____ across a period on the periodic table and ______ down a group | increases, decreases |
| Atomic radius generally ________ across a period (moving left to right) and _______ down a group on the periodic table. | decrease, increase |
| Non-metallic character ______ across a period on the periodic table, but _____ down a group | increase, decrease |
| Metallic character _______ across a period (from left to right) and _______ down a group on the periodic table. | decrease, increase |
| hardest most dense metals are found in | d block |
| most chemically active halogen | fluorine |
| does metals or nonmetals have greater ionization energies | nonmetals |
| metals to the ______, nonmetals to the _____ | left, right |
| Metals tend to form _______ | cations |
| nonmetals tend to form | anions |
Created by:
lily_dixon
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