Neon has 10 protons and 10 electrons. how many additional electrons would it take to fill the outer (second) electron shell?
a) 0
b) 1
c) 2
d) 6

Aplanet of mass m 6.75 x 1024 kg is orbiting in a circular path a star of mass m 2.75 x 1029 kg. the radius of the orbit is r 8.05 x107 km. what is the orbital period (in earth days) of the planet tplanet?

In a series circuit the __ is the same at every point

As the distance from a magnet increases, what happens to the magnet force?