Potassium decays by beta decay part of the nuclear equation is shown below. fill in the blank with a number
42 19 k --> 0 -1 e+ 42 ? ca

If the atomic mass of an atom is 34 and the atom contains 13 protons, how many neutrons does the atom contain?

Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li

Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?