General Definitions + Rules Flashcards
Mole
Measurement of an element/compound equal to mass number in grams
Avagodro’s number
atoms in a mole
Diatomic Gases
Gases that naturally occur bonded as 2 atoms
Elemental Gases
Pure elements that exist as gases at STP
Pure Substances
Uniform compounds/elements that have a fixed formula/symbol
Rule for Max Electrons per Shell
2n^2
Acids
Chemical substance that can react with bases to form salts; donate protons (H+) and have hydrogen in it
Bases
Chemical substance that reacts with acids to form salts; take protons (H+) and have hydroxide in it
More dissociation means that an acid/base is
stronger
Concentration
Amount of molecules found in a solution
Salts
Assembly of cations and anions to create a neutral (ionic) compound
metal + nonmetal
Ionization Energy
Minimum energy required to remove most loosely bound electron
As you move from left to right, ionization energy ________ (increases/decreases)
increases
Electron Affinity
Willingness of an atom to gain electrons
As you move from lower left to upper right, electron affinity ______ (increases/decreases)
increases