An atom is determined to contain 12 protons, 10 electrons, and 12 neutrons. what are the mass number and charge of this atom or ion?

select one:
a. mass number: 24, charge: +2
b. mass number: 22, charge: neutral
c. mass number: 34, charge: -2
d. mass number: 34, charge: +2

Select all of the methods through which a drug can enter your body. injection swallowing inhalation absorption

Complete each row of the table below by filling in the missing prefix or missing exponent.

In a heat engine of 1000 j of heat enters the system and the piston does 500 j of work what is the final internal energy of the system if the inital energy was 2000 j we have to do all of these down here 1)write the equation 2)list out your know variables 3)plug the numbers into the equations 4)solve 5)write your solution statemtn that includes inital energuy and final energuy added