1.) which of the following elements has the most properties in common with magnesium (mg)? a.) beryllium (be) b.) manganese (mn) c.) aluminum (al) d.) sodium (na) 2.) which of the following states that there is a regular recurrence of properties if the elements are arranged in order of atomic number? a.) periodic law b.) ionization energy c.) ionic size d.) electronegativity

C3h8o3 - glycerol major species present when dissolved in water

An atom with 7 protons, 6 neutrons, and 7 electrons has an atomic mass of amu. (enter a whole number.) numerical answers expected! answer for blank 1:

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