| A | B |
|---|
| PROTONS | POSITIVE ATOMIC PARTICLE FOUND IN THE NUCLEUS |
| NEUTRONS | NEUTRALLY CHARGED PARTICLE FOUND IN THE NUCLEUS |
| ELECTRONS | NEGATIVE ATOMIC PARTICLES FOUND SURROUNDING THE NUCLEUS |
| NUCLEUS | center of an atom; made up of protons and neutrons |
| PERIODIC LAW | properties of elements tend to repeat in a regular pattern when elements are arranged in order of increasing atomic number |
| FAMILY | vertical column on periodic table, also known as a group; elements have similar chemical and physical properties and same number of valance electrons |
| PERIOD | horizontal row of elements; elements in the same row have same number of orbitals |
| METALS | grouped on left side of periodic table; elements are shiny and conduct heat and electricity |
| NONMETALS | elements that are poor conductors of heat and electricity; grouped on the right side of periodic table |
| METALLOIDS | elements that have properties of metals and nonmetals |
| ATOMIC MASS | weighted average mass of element's isotopes |
| ISOTOPE | variation of an element that has the same number of protons but different number of neutrons |
| MENDELEEV | father of periodic table: determined the relationship of elements to organize them into a table |
| MOSLEY | determined the atomic number NOT atomic weight determined order of elements in the periodic table |
| HYDROGEN FAMILY | family with single member that is a non metal gas |
| TRAMSITION METALS | the largest family in the periodic table with a lot of electrons (normally) and distribute them in many advanced/ complicated ways |
| BORON FAMILY | 3 valence electrons, composed of a metalloid and metal, aluminum is important because it is light, strong, and does not corrode |
| NOBLE GASES | located on the far right column of the periodic table |
| NITROGEN FAMILY | 5 valence electrons, tend to share electrons, |
| HALOGEN FAMILY | located in the second column from the right side of the periodic table |
| ALKALI METAL FAMILY | located to the far left side of the periodic table excluding hydrogen, members have 1 valence electron |
| ALKALINE EARTH METALS | highly reactive but not as reactive as Alkali metals...have 2 valence electrons |
| HALOGEN FAMILY | non-metals that form salts |
| NOBLE GASES | these elements are very un reactive because they have their outer shells fully filled with eight electrons |
| ALKALI METAL FAMILY | very reactive because they only need to lose one electron to have a full shell |
| NOBLE GASES | also known as Inert Gases |
| ALKALINE EARTH METAL FAMILY | when they are mixed in solutions they form basic solutions |
| ACTINIDE FAMILY | group of metals in the bottom row of the periodic table, radioactive and some are not found in nature |
| LANTHANIDE FAMILY | group of metals located on the second row from the bottom of the periodic table. Some of these elements can be found in superconductors, glass production, or lasers. |
| CARBON FAMILY | 4 valence electrons, composed of 1 nonmetal, 2 metals, 2 metalloids--compounds form the "basis for life" |
| NITROGEN | element that is most abundant element in atmosphere |
| CARBON | element that forms 5 million compounds and is called 'basis of life'. |
| OXYGEN | most abundant element in earth's crust |
| RARE EARTH ELEMENTS | classification that includes the actinide and lanthanide families |
| OXYGEN FAMILY | 6 valence electrons, tend to share electrons |
| MALLEABLE | can be hammered into thin sheets |
| DUCTILE | can be drawn into thin wires |
| CHALCOGEN | also known as the oxygen family |
| PNICTOGEN | also known as the nitrogen family |
| CHALCOGEN | family of ore forming elements |
