Determine the mass of the following. a) 5.65 x 1024 molecules of CaBr2
b) 4.25 x 1023 molecules of N2
c) 9.10 x 1022 molecules of Ba(NO3)2
d) 3.01 x 1022 molecules of Ga2(CO3)3

Write the complete balanced equation for the reaction between lead (iv) oxide (pbo2) and water (h2o).

As you move from right to left on the periodic table the atomic radius fill in the blank

Which of the following statements is true? a. elements in the last period are radioactive. b. atomic weight is the same as atomic mass. c. elements in the same group have the same number of electron shells. d. atomic number equals the number of neutrons in the nucleus of an atom.