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| anything that takes up space and has mass |
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| a substance that can't be broken down to other substances by chemical reactions (92) |
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| substance consisting of two or more different elements in a fixed ratio |
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| those required by an organism in only minute quantities |
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| the smallest unit of matter that still retains the properties of an element |
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| subatomic particle having no electrical charge in the nucleus ~ 1.7 x 10 ^-24 g |
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Definition
| single positive electrical charge in nucleus ~ 1.7x10^-24 g |
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Definition
| single negative electrical charge around the nucleus |
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Definition
| unit of measurement equivalent to the amu |
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| # of protons in the nucleus of an atom (xH) |
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Definition
| sum of protons and neutrons in the nucleus of an atom (xH) |
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| total mass of an atom in g/mol |
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| different atomic forms of the same element |
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Definition
| one in which the nucleus decays spontaneously, giving off particles and energy |
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| energy that matter possesses b/c of its location/ structure |
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fixed level of potential energy
1st < 2nd < 3rd shell |
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Definition
| the 3-D space where an electron is found 90% of the time |
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Definition
| attraction between 2 atoms, resulting from a sharing of outer-shell electrons or the presence of opp charges on the atoms |
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Definition
| sharing of a pair of valence electrons by two atoms |
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Definition
| 2 or more atoms held together by covalent bonds |
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Definition
| the attraction of a particular kind of atom for the electrons of a covalent bond |
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Definition
| electrons are shared equally |
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Definition
| one atom is bonded to a more electronegative atom |
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Definition
a charged atom or molecule
cation= charge is positive
anion= charge is negative |
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Definition
| attraction of cations and anions |
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Definition
| weak bond that forms when a hydrogen atom covalently bonds to one electronegative atom is also attracted to another atom (N or O) |
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| van der Waals interactions |
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Definition
| weak and only occur when atoms and molecules are very close together |
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Term
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Definition
| signal molecules made by the pituitary gland that bind to the receptors, relieving pain and producing euphonia during times of stress |
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Definition
| making and breaking of chemical bonds |
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| matter cannot be ____ or ______ |
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Definition
| matter cannot be created or destroyed |
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Definition
point at which the reactions offset one another exactly
-aka the concentrations have stabilized at a particular ratio |
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