22.

unknown.

less than 22.

more than 22.

take equivalent forms.

only be transferred from one place to another.

be saved, like money in a bank.

be created or destroyed, as in nuclear reactions.

involves repulsive as well as attractive forces.

invokes the inverse-square law.

is a fundamental physical law.

uses a proportionality constant.

protons

neutrons

ions

electrons

protons

electrons

ions

neutrons

ionic.

positively charged.

negatively charged.

electrically neutral.

a negative charge.

no charge since the cloud is electrically neutral.

a positive charge.

an electrically grounded state.

repelled from the balloon.

attracted to the balloon.

too bound to negative charges in the wall to have any effect.

eutralized.

attracted to the balloon.

repelled from the balloon.

too bound to negative charges in the wall to have any effect.

neutralized.

a uniformed strength throughout

only magnitude.

both magnitude and direction.

no direction.

closest.

farthest apart.

longest.

thickest.

follows the inverse-square law.

inside cancels to zero.

tends toward a state of minimum energy.

is shielded from external charges.

only on their locations in their respective fields.

on their locations in their respective fields and on the work done on them.

only on the work done on them.

on their kinetic energies exceeding their potential energies.

both are measured using the units of coulomb.

both are measured using only the units of joules.

the two terms are different names for the same concept.

electric potential is the ratio of electrical potential energy per charge.

cannot store energy.

can store energy and charge

cannot store charge.

can only store energy.