If an element has 6 electrons, how many of them will be in the 2nd energy level?
how many neutrons does element x have if its atomic number is 54 and its mass number is 163?
if element x has 106 protons, how many electrons does it have?
an element's atomic number is 29. how many protons would an atom of this element have?

Which changes would result in a decrease in the gravitational force btween two objects? check all that apply

Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length of a column of water 1.00 km high for a temperature increase of 1.00ºc. note that this calculation is only approximate because ocean warming is not uniform with depth. (answer in ×10^{-3} −3 m)

If the work required to stretch a spring 3 ft beyond its natural length is 15 ft-lb, how much work is needed to stretch it 27 in. beyond its natural length?