a change in size, shape, or the state of matter without a change in chemical properties.

a change that occurs when one or more substances change into entirely new substances with different properties.

matter is not created nor destroyed in any chemical or physical change

the smallest particle of an individual element

a subatomic particle that has a positive charge and that is found in the nucleus of an atom

a subatomic particle that has no charge and that is found in the nucleus of an atom

a negatively charged particle that orbits the nucleus of an atom.

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.

the sum of the numbers of protons and neutrons in the nucleus of an atom

a region around the nucleus of an atom where electrons are likely to be found

an atom's central core, containing protons and neutrons.

a chart that organizes elements based upon electron arrangements and their properties

a 1-3 set of letters used to represent an element, the first letter is always capitalized and all subsequent letters are lowercase

an element that is shiny and conducts heat and electricity well

elements that are poor conductors of heat and electric current

elements with properties that fall between those of metals and nonmetals (some are used as semiconductor chips in the computer industry)

vertical columns on the periodic table, elements share similar chemical properties, and generally have the same number of valence electrons

elements that are in the same horizontal row on the periodic table-these elements share the same number of orbitals also known as energy levels and shells

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