For an atoms electrons, how many energy sublevels are present in the principal energy level n = 4? A. 4
B. 9
C. 10
D. 16
E. 32

What is the mass of 0.46 mil of mgcl2

How can the periodic table be used to predict the behavior of elements?

4.25g sample of solid ammonium nitrate dissolves in 60.0g of water in a coffee-cup calorimeter, the temperature drops from 22.0 c to 16.9 c. assume that the specific heat of the solution is the same as that of pure water. calculate delta(h) (in kj/mol nh4no3) for the solution proces.