What was the significant change that Glenn Seaborg made to Mendeleev's periodic table?

How did Rutherford's gold foil experiment disprove the plum pudding model?

For an alloy that consists of 78.2 g copper, 103.5 g zinc, and 2.8 g lead, what are the concentrations of (a) Cu, (b) Zn, and (c) Pb in weight percent? The atomic weights of Cu, Zn, and Pb are 63.54, 65.39, and 207.2 g/mol, respectively.

Matter that flows to fit its container includes?

If 3.11 mol of an ideal gas has a pressure of 2.91 atm and a volume of 78.13 L, what is the temperature of the sample in degrees Celsius?

9. A change in color when two solutions are mixed together is a clue that a __has taken place. A. chemical change B. physical change C. temperature change D. change in state

Which molecules is amphoteric? A) NH4+ B) H2O C) H2CO3- D) H2SO4

Nickel (i) iodide reacts with chlorine to produce?

What are some examples of not all liquid's evaporating at the same rate?

Suppose you went bowling, but instead of a bowling ball you rolled a ping pong ball down the alley. What do you think would happen?

Which expression represents the ΔH for a chemical reaction in terms of the potential energy, PE, of its products and reactants?