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Science Chapter 16

chapter 16

Atomic Mass The average mass of one atom
Periodic Table A table of elements
Nucleus The core of an atom
Proton Smaller particles in the nucleus
Neutron Small Particles outside of the nucleus
Electron Small particles outside of the nucleus
Atomic Mass Unit (amu) Used to measure the particles of an atom
Atomic Number The number of protons in in it s nucleus
Chemical Symbol A one or two letter symbol
Group The elements in a column
Family The elements in a column also called groups
Period A horizontal row across a table
Valence Electrons Electrons that involve transfer or sharing
Malleable A material that can be pounded into many other shapes
Ductile A material that can be pulled out or drawn into an long wire
Conductor A metal that transmits heat and electricity easily
Magnetic Metals that are attracted to magnets
Reactivity The ease and speed at witch an element combines or reacts with other metals
Corrosion The wearing away of a metal
Alloy A mixture of metals
Alkali Metal The metals are so reacted they are never found inn nature
Alkaline Earth metals Not as reactive as alkali they are gray and white
Transition Metals Form a bridge between very reactive metals
Lanthanide The elements at the bottom of the table
Actinide Rare earth metals
Non metal Elements that lack most of the properties of metals
Diatomic molecule When they contain only two metals
Halogen Family 7 valence electrons very reactive
Noble Gas They do not lose gain or share there Valence Electrons
Matalloid Have half of the characteristics of metals and some of the characteristics of non-metals
Semiconductor Substances under the same conditions carry electricity
Plasma Atoms are stripped of there electrons and the nuclei are packed closely together
Nuclear Fusion When colliding nuclei have enough energy to join together
Suernova A tremendous explosive that breaks apart
Created by: kodamiller