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Atoms and Elements

Atoms, Elements, and the Periodic Table Vocabulary Review

TermDefinition
Atom The smallest particle of matter that still has the properties of an element.
Atomic Mass The average mass of the isotopes of an element.
Atomic Number The number of protons in an atom.
Compound A combination of two or more elements that have chemically bonded.
Electron The negative charged particles in an atom that surround the nucleus.
Element Matter made of only one kind of atom.
Isotope Different forms of an atom of the same kind of element that have a different number of neutrons.
Law of Conservation of Matter Scientific law that states that matter is neither created nor destroyed, just changed.
Mass Number The number of protons plus neutrons in an atom or the atomic mass rounded to the nearest whole number.
Matter Anything that has mass and takes up space.
Metal Usually shiny, good conductors of heat and electricity, solids, malleable, ductile.
Metalloid Characteristics of metals and nonmetals.
Mixture Combination of elements where they are not chemically bonded.
Neutron Particle with no charge (neutral).
Nonmetal Opposite of metal.
Nucleus The center of an atom.
Proton Particle with a positive charge.
Substance Matter with the same composition and properties throughout.
Created by: Iris_Sanchez95
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