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unit4 vocabulary
| Term | Definition |
|---|---|
| atomic mass | average mass of one atom of an element |
| periodic table | a chart where all elements are organized into periods and groups according to their properties |
| chemical symbol | one of two letter code that stands for an element;many symbols are abbervationsof the elements |
| period | chemisty: a row of elements in the periodic table arranged by atomic numbers |
| group | colum of elements in the periodic tab, in which elements have certain properties in common;also called chemical family |
| matter | the material that all objects and substances are made of ; anything that has mass and takes up space |
| element | substances that are the building blocks of all matter;an element is made up of one kind of atom |
| compound | matter made of two or more elements elements; the elements in a compound are chemically bonded cannot be separated by physical means, and a compound has properties that are different from the elements that make it up |
| atoms | smallest particle into which an elementcan be divided and still have the properties |
| electron | negativly charged particle found outside the nucleus of an atom |
| nucleus | biology structure near the center of a cell that contains the cell's |
| proton | positively charged particle located in the nucleus of an atom |
| nuetron | in an atom, particle with a neutral charge ; located in the nucleus |
| energy level | the amount of energy carried by an electron in an atom; determines the electron's average distance from the nucleus. |
| isotope | atoms for the same element with different numbers of nuetrons in the nucleus, and thus different atomic mass; for example ,carbon-12 and carbon-14 |
| mass number | the sum of protons and neutrons in the nucleus of an atom |
| atomic number | number of protons in the nucleus of one atom af an atom |
| mutal | a type pf symbiosis in which both partners benefit from living together |
| malleable | a term used to describe meterialthat can be pounded into shapes |
| ductile | a term used to describe that can be pulled out,into a long write |
| conductivity | the ability of an object to transfer heat or electricity to another object |
| reactivity | the ease and speed with which an element combines,or reacts with other elements and compounds |
| corrision | the gradual wearing away of a metal element due to a chemical reaction |
| alki metal | an element in group 1 of the periodic table |
| alki earth metal | an element in group 2 of the periodic table |
| transition metal | one of the elements in groups 3 through 12 of the periodic table |
| alloy | a mixture of tow or more elements one of which is a metal |
| non metal | an element that lacks most of the properties of a metal |
| diatomic molecule | a molecule consisting of two atoms |
| nalogen | group of elements on the periodic table |
| noble gas | an element in group 18 of the periodic table |
| metalloid | an element that has some characteristic of both metals and non metals |
| semi conductor | a substance that conduct electricity under some conditions |
Created by:
cheer_perfection54
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