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Module 3 Vocab
Definition | Term |
---|---|
the seven main rows on the Periodic Table | periods |
anything with a natural order that has a repeating pattern | periodic |
the % of an isotope that is found in nature | natural abundance |
the weighted average of all naturally occurring isotopes of a naturally occurring element, or the most stable isotope of an artificial element | average atomic mass |
a column on the periodic table whose elements have similar properties | family |
the elements in the first group of the periodic table, excluding hydrogen (lithium, sodium, potassium, rubidium, cesium, francium) | alkali metals |
the elements in the second group of the periodic table (beryllium, magnesium, calcium, strontium, barium, radium) | alkaline earth metals |
the elements in the second to last family on the periodic table (fluorine, chlorine, bromine, iodine, astatine) | halogens |
the elements in the last family on the periodic table (helium, neon, argon, krypton, xenon, radon) | noble gases |
an atom or element which falls to the right of the stair-stepping line on the periodic table (includes hydrogen) | nonmetals |
an element which falls to the left of the stair-stepping line on the periodic table (except hydrogen) | metals |
metals which are not transition or inner transition metals | main group metals |
the elements in any of the groups starting with scandium through zinc | transition metals |
the elements on the two rows which appear underneath the main body of the periodic table | inner transition metals |
the first row of inner transition metals which come after lanthanum | lanthanides |
the second row of inner transition metals which come after actinium | actinides |