Term Definition
Element Pure substance made of only 1 atom.
Atom Smallest particle of matter
Nonmetals an element or substance that is not a metal.
Atomic Mass the mass of an atom of a chemical element expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the atom
Corrosive tending to cause corrosion.
Chemical Symbol Chemical symbols are used in much the same way.
Ductile (of a metal) able to be drawn out into a thin wire.
Luster a gentle sheen or soft glow, especially that of a partly reflective surface.
Metals a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivity
Electrons a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.
Metalloids an element (e.g., germanium or silicon) whose properties are intermediate between those of metals and solid nonmetals. They are electrical semiconductors.
Density the degree of compactness of a substance.
Atomic Number the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table
Malleable (of a metal or other material) able to be hammered or pressed permanently out of shape without breaking or cracking
Protons a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign.
Melting S to L
Evaporation L to G
Condensation G to L
Freezing L to S
Deposition G to S
Sublimation S to G
Neutrons Found inside the nucleus have no charge
Atomic Theory the study of the atom

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