Is N2 an element compound pure substance homogenous mixture heterogeneous mixture or a solution

How many neutrons are in the element phosphorus?

What type of force is produced when two objects are in contact, then move (or try to move) past each other? A. frictional B. electrical C. tensional D. gravitational

Helium balloons stay the same size as you hold them, but swell and burst as they rise to high altitudes when you let them go. What are the forces on the inside of the balloon? What are the forces on the outside of the balloon?

If you are trying to find the number of moles of gas present and you record a pressure of 123.3 kPa which value of R would you use?

Does Radiant Energy contain Kinetic, or potential energy or both?

A 5.0 M solution of HCL in water has a proton concentration of _M

How many moles are in 25.5 grams of Silver, Ag?

How do nonmetals conduct electricity? well. by giving up electrons. poorly. better than metals.

Why is neon in the same group on the periodic table as helium?

How does bohrs model agree with Thomson model