seventh paper Flashcards
(40 cards)
mass proton =
2000 mass of electron
charge proton =
electron
mass neutron =
mass proton
electric charge does not have continous ____ it occurs in multiples of basic _____
value
units
an atoms charge is neutral if…
it has the same number of protons and electrons
an atom is said to be ionized if…
if the number of protons and electrons is different
if the protons outnumber the electrons, there is a more _____ charge
positive
what is a positive ion?
if protons outnumber electrons
if the electrons outnumber the protons, there is a ____ charge
negative
what is a negative ion?
if electrons outnumber protons
what is electrostatic charge?
electrons moving from atom to atom to create ions
positively charged ions result from the loss of ____
electrons
negatively charged ions result from the gain of _____
electrons
what happens when we comb our hair?
combing transfers electrons from the hair to the comb by friction
what charge does the comb and hair have after we brush?
comb has a negative charge
hair has a positive charge
since every hair has the same charge, they ____ each other
repel
why can we stick a balloon to the wall after rubbing it in our hair?
the wall becomes polarized and is attracted to the balloon.
what happens if we could charge a balloon positively? would it still stick to the wall?
the balloon would stick to the wall because of the walls opposite polarization
since similar charges ____, the charges wil be distributed on the ____ of the conductor of _____
repel
surface
charge
in isolated systems, charge is ____
conserved
it is not possible to ____ or ____ a single charge
create
destroy
charge can be created from ____
energy
what is coulombs law?
the force between two charged objects is proportional to the product of their charges divided by the square of the distance between them.
charge is measured in _____
coulombs
