The symbol of an element is represented by (a) Calculate the number of neutrons in the atom of X. [1mark] (b) State the number of electrons in the atom of X.[1mark] (c) Write the electronic configuration of X.

Select the correct answer. wax is a nonpolar substance. in which type of substance is it most soluble?

Which of the following are in a chemical family a. ca, sc, k b. cu, ag, au c. so, ge, sb

A0.10 m aqueous solution of sodium sulfate is a better conductor of electricity than a 0.10 m aqueous solution of sodium chloride. which of the following best explains this observation? (a) sodium sulfate is more soluble in water than sodium chloride. (b) sodium sulfate has a higher molar mass than sodium chloride. (c) to prepare a given volume of 0.10 m solution, the mass of sodium sulfate needed is more than twice the mass of sodium chloride needed. (d) more moles of ions are present in a given volume of 0.10 m sodium sulfate than in the same volume of 0.10 m sodium chloride. (e) the degree of dissociation of sodium sulfate in solution is significantly greater than that of sodium chloride.