Practice DAT Exam #14 - General Chemistry

Resume with #57

isoelectronic species

different elements or ions that have an equal number of electrons

oxidation

LOSING

ELECTRONS IS

OXIDATION

reduction

GAINING

ELECTRONS is

REDUCTION

alpha decay

when a nucleus emits an alpha particle; alpha particle are composed of 2 protons and 2 neutrons, making them the same as a He atom

bc the atom’s nucleus is giving away two protons and two neutrons, the atom’s atomic number (number of protons) will decrease by two and its mass number (number of proton + neutrons) will decrease by 4

ligand

lewis base

all lewis bases are electron donors—in order to act as a lewis base, a molecule must have some excess electrons it can donate

• excess electrons are found as negative charges on molecules or as lone electron pairs

• a molecule CANNOT act as a lewis base if it lacks a negative charge or any lone pairs of electrons

metals…

• shiny

• malleable (able to be beaten into sheets)

• ductile (able to pull into a wire)

• good conductors of heat and electricity

ex: Na, any other group 1

increasing the solute concentration in a solution will cause...

a decrease in freezing point and decrease in vapor pressure

—

adding a solute to solution will depress(lower) the freezing point of the solution and elevate (increase) the boiling point of the solution

• if the bp increases, the vapor pressure must decrease

the more volatile the liquid…

the higher the vapor pressure

the weaker the IMF…

the more volatile the liquid