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Sci Vocab. Mrs.White

Study For Test

A particle with a negative electrical charge Electron
The center of an atom, which contains most of the atom's mass Nucleus
A positively charged particle inside an atom's nucleus Proton
A particle that is found in the nucleus of an atoms and has no electrical charge Neutron
An area where electrons arranged in energy levels, travel around an atom's nucleus Electron Cloud
A pure substance that cannot be broken down into a simpler substance Element
The number of protons in an atom or an element Atomic Number
One or two or more atoms of an element having the same number of protons but a different number of neutrons Isotope
The average mass of the atoms of an element Average Atomic Mass
A chart that shows the elements in order of increasing atomic numbers Periodic Table
A chemical bond that forms when atoms share electrons Convalent Bond
At an attraction that holds oppositely charged ions close together Ionic Bond
A substance formed by the chemical combination of two or more elements Compound
An atom that positively or negatively charged because it has gained or lost electrons Ion
A chemical reaction that releases energy Exothermic Reaction
A chemical reaction that absorbs energy Endothermic Reaction
The measure of how fast a chemical reaction occurs Rate of Reaction
A substance that speeds up a chemical reaction but is not used up itself or permanently changed Catagst or Catayst
Created by: KHunter