click below
click below
Normal Size Small Size show me how
zacperiodictablevoca
| Term | Definition |
|---|---|
| group/family | vertical column of elements in the periodic table; have the same number and arrangement of valence electrons |
| period | horizontal row of elements in the periodic table |
| valence electrons | electrons located in the last energy level/shell of an atom |
| metals | element that have the property of shiny luster, ductility, and malleability. most elements are metals |
| luster | the way a material reflects light |
| malleable | able to be hammered into different shapes |
| ductile | able to be drawn into thin wires [metals] |
| nonmetals | elements that have different property then metals; dull and brittle; located to the right of the zig zag line on the periodic table |
| halogens | elements that make up group 17 on the periodic table; most likely to form negative ions |
| noble gasses | elements that make up group 18 on the periodic table; all elements contain a stable number of valence electrons |
| alkali metals | metals in group one of the periodic table; they are very reactive |
| alkaline earth metals | metals in group 2 of the periodic table |
| metalloids | elements that have the property's of both metals and non metals |
| isotope | atom of a elements that has the same number of protons as the other atom, but a different number of neutrons |
| ion | charged atom formed when the atom gains or looses electrons |
| ionic bond | bond formed between atoms that have gained or lost electrons; one atom transfers electrons to another |
| covalent bond | bond formed when atoms share electrons |
| subscript | little numbers below the line that tells you how many atoms of an element there are in a molecule EX: H2O, the subscript is 2 |
| coefficient | regular sized numbers in front of a formula that tells you how many molecules there are EX: 3 H2O, the coefficient is 3 |
| reactant | molecules to the left of the arrow in the chemical equation |