The table below shows the number of sub-atomic particles in an atom of magnesium. sub-atomic particles sub-atomic particle protons 12 neutrons 12 electrons 12 what is the amu of a magnesium atom? a: 0b: 12c: 24d: 36

24, because to get the AMU of an element you just add the number of protons and neutrons, because of the fact that electrons weight next to nothing.

magnified images possible images can be real = projected onto a screen

the only real purpose of sputnik 1 was to beat the us into space. we were getting close to launching a useful satellite, explorer 1 - which launched on january 31, 1958. the ussr had to beat that, so they launched sputnik 1 on october 4, 19