What element has 2 protons, 2 neutrons and 2 electrons.
what element has 3 protons, 3 neutrons and 3 electrons.
what element has 11 protons, 11 neutrons and 11 electrons.

Heena wants to measure the volume of a ball that is 24 cm across. how should she set up her equation?

When you jump from an elevated position you usually bend your knees upon reaching the ground. by doing this, you make the time of the impact about 10 times as great as for a stiff-legged landing. in this way the average force your body experiences is a) less than 1/10 as great. b) more than 1/10 as great. c) about 1/10 as great. d) about 10 times as great.

Asap and show ! a 14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.