Atransmutation reaction must always involve a(n)
a. change in the number of electrons in the atom
b. decrease in the number of neutrons in the nucleus of an atom
c. increase in the number of neutrons in the nucleus of an atom
d. change in the number of protons in a nucleus of an atom

Find the mass, in grams, of 5.00*10^23 molecules of f2

Δu of , in kj/kg, as it isto k, (a)as a of , (b) at , (c) at .

Which of these statements best explains why space exploration should be encouraged? it prepares humans to live without oxygen. it dispel myths about objects in space. it prevents comets and asteroids from striking earth. it creates technology to absorb harmful radiations in space.