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23 Cards in this Set
- Front
- Back
Definiton of PROTONS?
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Postitivly charged and packed tightly with neutrons to form a dense core, or nucleus, at the center of the atom.
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Definiton of ELECTRONS?
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Negativly charged, and move about the nucleus at nearly the speed of light.
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Definiton of DALTON?
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A unit of measurement in honor of John Dalton, the British scientist who helped develop atomic theory around 1800.
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Definiton of ATOMIC NUMBER?
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The number of protons in the nucleus of an atom. unique for each element and designated by a subscript to the left of the elemental symbol.
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Definiton of ATOMIC WEIGHT?
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The total mass, which is the mass in grams of one mole of the atom.
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Definiton of ISOTOPES?
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The different atomic forms of the element.
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Definiton of MATTER?
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Anything that takes up space and has mass.
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Definition of ELEMENT?
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A substance that cannot be broken down to other substances by chemical rections.
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Definiton of COMPOUND?
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Two or more emements may combine in a fixed ratio to produce a COMPOUND.
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Definiton of TRACE ELEMENTS?
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Required by an organism in minute quantities.
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Definiton of a Neutron?
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Neutrally charged and packed tightly with protons to form a dense core, or nucleus, at the center of the atom.
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Definiton of RADIOACTIVE ISOTOPE?
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One in which the nucleus decays spontaneously, giving off particles and energy.
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Definiton of ENERGY?
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The ability to do work.
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Definiton of POTENTIAL ENERGY?
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The energy that matter stored because of it's position or location.
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Definiton of ENERGY LEVELS (ELECTRON SHELLS)?
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The different states of potential energy for electrons in an atom.
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The definition of ORBITAL?
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The three dementional space where an electron is found 90% of the time.
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Definiton of VALENCE ELECTRONS?
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The outer electrons.
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Definiton of VALENCE SHELL?
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The outermost energy shell.
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Definiton of STRUCTURAL FORMULA?
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A type of molecular notation in which the constituent atoms are joined by lines representing covalent bonds.
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Definiton of CHEMICAL BONDS?
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Interactions that result in atoms staying close together, held by these attractions.
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The definiton of COVALENT BONDS?
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The sharing of a pair of valence electrons by two atoms.
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The definiton of MOLECULAR FORMULA?
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A type of molecular notation indicating only the quantity of the constituent atoms.
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The definiton of a DUBBLE COVALENT BOND?
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Two oxygen atoms form a molecule by sharing two pairs of valence electrons cause the joining of atoms.
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