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8 Sci Periodic Table

8 Science Atoms, Elements, and the Periodic Table

TermDefinition
MATTER Anything that has mass and takes up space.
ATOM Small particle that makes up most types of matter, the basic unit of a chemical element.
LAW OF CONSERVATION OF MATTER Matter is not created or destroyed, it only changes form.
ELEMENT Substance that can’t be broken down into simpler substances, made of only one kind of atom.
ELECTRON Negatively charged particle of an atom.
NUCLEUS Central part of the atom.
PROTON Positively charged particle in the nucleus.
NEUTRON Neutral particle in the nucleus.
ELECTRON CLOUD Region around the nucleus organized into shells or energy levels.
ION An atom in which the number of protons differs from the number of electrons
PERIODIC TABLE OF ELEMENTS Arrangement of the chemical elements ordered by their atomic number and chemical properties.
ATOMIC MASS NUMBER Total number of a chemical elements protons and neutrons.
REACTIVITY How easily an element will combine with other elements
ATOMIC NUMBER Number of protons in an atom.
ISOTOPES Atoms of the same element that have different numbers of neutrons.
PERIOD Arrangement of chemical elements in a series of rows with similar properties and electron orbitals.
GROUP Family of chemical elements in columns with similar chemical properties and number of valence electrons.
METALS Elements with a shiny or metallic luster and good conduction of heat and electricity.
NONMETALS Elements that are usually dull in appearance, and poor conductors of heat and electricity.
METALLOIDS Elements that have characteristics of metals and nonmetals
Created by: smurray817