The noble gases include helium, neon, argon, krypton, xenon, and radon. What property do these elements share?

2pos suppose an object in free fall is dropped from a building. its starting velocity is 0 m/s. ignoring the effects of air resistance, what is the speed (in m/s) of the object after falling 3 seconds? give your answer as a positive decimal without units. answer here

Calculate the percent composition by mass of each element in al(oh)3. use at least three significant figures.

Which subshell is represented by the actinides family?