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NatHug2020
FLASHCARDS Mrs. NELDA MADE ME DO
| Term | Definition |
|---|---|
| Periodic table | Table of elements |
| element | identity of an atom |
| element symbol | letters that represent the type of atom it is |
| atomic mass | weight of atom |
| atomic # | the #of protons and electrons is in the atom |
| Period | horizontal row if elements |
| Group | vertical row of atoms |
| Family | when a group of atom share the same traits |
| Chemical formula | Equasion of atoms an |
| Metals | any of a class of elementary substances, as gold, silver, or copper, all of which are crystalline when solid and many of which are characterized by opacity, ductility, conductivity, and a unique luster when freshly fractured. |
| nonmetals | an element not having the character of a metal, as carbon or nitrogen. |
| metalloids | a nonmetal that in combination with a metal forms an alloy. an element that has both metallic and nonmetallic properties, as arsenic, silicon, or boron. |
| noble gasses | any of the chemically inert gaseous elements of group or of the periodic table: helium, neon, argon, krypton, xenon, and radon. |
| Reactivity | the relative capacity of an atom, molecule, or radical to undergo a chemical reaction with another atom, molecule, or compound. |
| Dimitri mendeleev | russian that created the first periodic table |
| trend | when a family has the same traits on a periodic table |
| energy level | the amount of reactivity an d propertys an atom has |
| valance electrons | electrons that bond with eachother |
| chemical property | a property or characteristic of a substance that is observed during a reaction in which the chemical composition or identity of the substance is changed: |
| physical property | when the identity is not changed but is changed by physical means |