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Test Bank For Chemistry 11th Edition By Raymond Chang Golds
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Test Bank For Chemistry 11th Edition By Raymond Chang Golds
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Test Bank For Chemistry 11th Edition ByRaymond Chang Golds
acid - ANSWERcompound that gives off H+ ions in solution
acidic - ANSWERdescribes a solution with a high concentration of H+ ions
anion - ANSWERions with a negative charge
anode - ANSWERthe electrode where electrons are lost (oxidized) in redox reactions
atmospheres - ANSWERcommon units for measuring pressure
atom - ANSWERthe smallest object that retains properties of an element. Composed
of electrons and a nucleus (containing protons and neutrons)
atomic number - ANSWERnumber of protons in an element
Avogadro's number - ANSWERnumber representing the number of molecules in (1)
mole: 6.022 * 10 to the 23 power
base - ANSWERsubstance which gives off hydroxide ions (OH-) in solution
basic - ANSWERhaving the characteristics of a base
Bohr's atom - ANSWERHe made significant contributions to the atom. He
understood the line spectra--the reason why only certain wavelengths are emitted
when atoms jump down levels
buffer solutions - ANSWERsolutions that resist change in their pH, even when small
amounts of acid or base are added
catalyst - ANSWERsubstances that speed up a chemical process without actually
changing the products of reactions
cathode - ANSWERelectrode where electrons have gained (reduction) in redox
reactions
cations - ANSWERion with positive charge
central atom - ANSWERin a Lewis structure, usually the atom that is the least
electronegative
charge - ANSWERdescribes an object's ability to repel or attract other objects.
Protons have a positive ...while electrons have a negative... Like ...repel each other,
while opposites attract.
, chemical changes - ANSWERprocesses or events that have altered the fundamental
structure of something
chemical equation - ANSWERan expression of a fundamental change in the
chemical substance
colligative properties - ANSWERproperties of a solution that depend only on the
number of particles dissolved in it, not the properties of the particles themselves. The
main ones are boiling point elevation and freezing point depression.
combustion - ANSWERwhen substances combine with oxygen and release energy
compound - ANSWERtwo or more atoms joined together chemically, with covalent or
ionic bonds
concentration - ANSWERthe amount of a substance in a specified space
conjugate acid - ANSWERa substance which can lose H+ ion to form a base
conjugate base - ANSWERa substance which can gain H+ ion to form an acid
covalent bonds - ANSWERwhen two atoms share at least one pair of electrons
decay - ANSWERchange of an element into a different element, usually with some
other particle(s) of energy emitted
density - ANSWERmass per unit volume of a substance
dipole-dipole forces - ANSWERintermolecular forces that exist between polar
molecules. Active only when the molecules are close together. The strengths of
intermolecular attractions increase when polarity increases
dispersion forces (London dispersion forces) - ANSWERdispersion is an
intermolecular attraction force that exists between all molecules. These forces are
the result of the movement of electrons which cause slight polar moments. Generally
very weak, when their molecular mass increases, so does their strength
dissociation - ANSWERbreaking down of a compound into its components to form
ions from an ionic substance
double bond - ANSWERwhen an atom is bonded to another atom by two sets of
electron pairs
effusion - ANSWERmovement of gas molecules through a small opening
electrochemical cell - ANSWERgives an electric current with a steady voltage as a
result of an electron transfer reaction
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