Definitions Flashcards
Isotopes
Atoms of the same element that have same number of protons but different number of neutrons
Co-ordination number
The maximum number of atoms that can be placed around a central metal/ion
Partial pressure
The pressure that a gas would exert if it alone occupied a container
Arrhenius acid
A substance that dissolves in water to give H+ ions
Arrhenius Base
A substance that dissolves in water to give OH- ions
Bronsted Lowry acid
Donates proton to a base
Bronsted lowry base
Accepts proton from an acid
Lewis acid
Substance that accepts an electron pair
Lewis base
Substance that donates an electron pair
Entropy
Measure of disorder in a system
Half-life
Time taken for the concentration of a reactant to fall to half its value
Rate of reactant
Change in concentration of reactants or products per unit time
Rate constant
A constant of proportionality in a rate equation
Mole
One mole contains exactly 6.02×10^23 elementary entities
Standard electrode potential
It is defined as the potential difference between a standard hydrogen electrode and a half cell in which the reating species are at a concentration of 1 mol/dm3 and 298K, and gaseous species at 1 bar.
