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16 Cards in this Set

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  • Back
Matter
anything that takes up space or has mass
Forms of matter
elements, compounds, and mixtures
4 states of matter
solid, liquid, gass, and plasma
Elements
cannot be broken down into simpler forms
How many elements are there?
90 elements occur naturally while the remaining 24 are created i the lab- 114 total
atom
building block of all matter- its possible to have a single atom of an element
molecule
neutral particle formed when atoms share eletrons
atom structure
atoms are made of three different particles
proton
positively charged-form nucleus
neutron
has no charge, found in the nucleus
proton
formed in the nucleus- positively charged
electron
negatively charged- found in the rings/shells that circle the nucleus
compound
pure substance that contains two or more elements that are chemically bonded
mixture
two or more substances physically bonded
chemical formulas
shows the elements in a compound
subscript
a small number found to the bottom right of an element's symbol. if there is one one element, no subscript is necessary