The mass number of an atom is obtained by totaling the number of and
a) electrons and protonselectrons
b) neutronsprotons and neutrons
c) neutrons and isotopes

Write the formula for the following chemicals. 7. e. trinitrogen tetraoxide a calcium phosphate f. magnesium acetate b. potassium sulfide g nickel(iii) cyanide c carbon dioxide h. silver sulfate d. cobalt(ii) chloride

How does the value of the equilibrium constant show that a reaction reaches equilibrium very quickly? (a) the equilibrium constant is large. (b) the equilibrium constant is small. (c) the equilibrium constant is zero. (d) the value of the equilibrium constant does not show how quickly a reaction comes to equilibrium.

Which of the following is in the lanthanide family? a) uranium b) promethium c) silver d) gold