At a given temperature and pressure, the volume of a gas is directly proportional to the amount of gas present. This is a statement of
A) Avogadro's Law.
B) Boyle's Law.
C) Charles's Law.
D) the Ideal Gas Law.
Question 2
When an electron in an excited atom falls down to a lower energy level, the excited atom emits a characteristic
A) electron.
B) neutron.
C) photon.
D) proton.