When do electrons emit energy? only when orbiting around nucleus only when knocked out of orbit when moving to a higher orbit when moving to a lower orbit

What is the molar mass of ca(cio4)2

Count the number of each type of atom in the equation below, and then balance the equation. write in the numbers of atoms and coefficients. add a 1 if there should be no coefficient. cs2(l) + o2(g) → co2(g) + so2(g) c [ ] s [ ] o > c [ ] s [ ] o [ ] cs2(l) + [ ] o2(g) > [ ] co2(g) + [ ] so2(g)

When the mercury level in a barometer decreases that atmospheric pressure has