| A | B |
|---|
| Element that aids in combustion and burning | oxygen |
| element used as a weapon of war, aka mustard gas in WWI | chlorine |
| Hydrogen and Helium: more flammable? | Hydrogen |
| Only metal that is liquid and room temp | Mercury |
| only metal that melts in your hand | Cesium |
| Father of periodic table | Mendeleev |
| Main rule in setting up Periodic Table | Atomic Weight |
| Vertical columns of periodic table | groups(gather elements that are similar) |
| Element that is "ignored" | Hydrogen |
| Periods | horizontal rows of the periodic table |
| Far Right Hand Column | Noble Gases |
| Far Left Hand Column | alkali metals |
| Characteristics of Alakali Metals | soft, can be cut with knife, corrosion is quick, floats on water, Hydrogen is a gas coming off |
| Bad Boy of Periodic Table | Flourine |
| He knew that atoms existed in ratios | Dalton |
| Sand is a chem product of ___ & ___ | oxygen, silicon |
| Metals(location) | left |
| Semi(location) | hugging stairs |
| Non(location) | right |
| He used structure of periodic table to design electron config. | Neils Bohr |
| Dmitri Mendeleev | 1869 published the 1st periodic table;focused on atomic weights&proportions of elements, wrote The Principles of Chem. |
| John Newlands | 1st 2 rulz that elem. fit in, trends, developed octaves periodicity pointed out that every 8th elem. resembled each other |
| Henry Moseley | determined that the proport. of elem. r related to atmc #, prdctd 3-4 elements in-between alum and gold; set up periodic table we use today |
| Periodic law | when the elem. are arrnged in order of increasing atomic #, there is a periodic repetition of their phys and chem props |
| another name for groups | families |
| representative elements | Groups 1A through 7A and Group 0 |
| transition metals | Group B elements |
| 2 rows below the main period table are the ____ & ____ | lantanides and anticides |
| Groups of the periodic table have similar/different physical and chem props | Similar |
| Noble gases | elements in which the outermost s and p subshells are filled (belong to group 0) |
| intert gases | these are also reffered to as noble gases b/c they do not participate in any chem reactions |
| representative elements | elements whose outermost s or p sublevels are only partially filled(usually called group A elements) |
| alkali metal | any metal in Group 1A of the periodic table |
| alkaline earth metals | any metal in Group 2A of the periodic table |
| halogens | any member of the nonmetallic elements in Group 7A of the periodic table |
| The group # correlates with the | outermost occupied energy level |
| transition metal | an element found in one of the B groups in the periodic table, or whose outermost s sublevel and the nearby d sublevel contains electrons |
| inner transition metals | elements whose outermost s sublevel and nearby f sublevel generally contain electrons, characterized by filling of f orbitals |
| atomic radius | one-half the distance between the nuclei in a molecule sonsisting of identical atoms |
| the atomic size and nuclear charge ____ as you go down the periodic table | increases |
