Potassium has an atomic number of 19.
which of a potassium atom's electrons are its valence electrons?
select one:
a. those in the third shell from the nucleus.
b. those in the second shell from the nucleus.
c. those in the outermost shell.
d. those in the innermost shell.

Arock can be broken down into different kinds of substances by physical processes. no chemical reactions are needed to separate different parts of a rock into pure substances. this is because a rock is a(n)

Which answer lists the fundamental forces in order from strongest to weakest

Compare the equilibrium constants for the systems shown in the table. which favors products the most? which favors products the least? rank these systems in order from most to least in terms of favoring products rather than reactants. d > b > a > c c > a > b > d b > c > d > a a > d > c > b