Select the true statements about alpha particles.

A. Alpha particle formation is accompanied by the conversion of a neutron into a proton.
B. Alpha particles have a mass number of 4.
C. Alpha particle formation is accompanied by the conversion of a proton into a neutron.
D. Alpha particles have a nuclear charge of 1.

Because air contracts as it cools, the air pressure inside a freezer is typically lower than on the outside. why do ice cubes inside a freezer tend to shrink over time? a. the ice dissolves oxygen from the air, forming a denser crystalline matrix.b. the ice reacts chemically with carbon dioxide in the air, forming gaseous carbon compounds.c. the ice melts, and then the liquid freezes as ice crystals on the bottom of the freezer.d. the ice sublimes, and then the water vapor deposits as ice crystals on the sides of the freezer.

Lightning is an example of what phenomenon? a release of a large amount of energyan absorption of a large amount of energya natural electric circuita natural electric current

Convection currents are caused by differences in what two things?