In the formation of 1.0 mole of the following crystalline solids from the gaseous ions, the most energy is released by A) NaF
B) MgF₂
C) MgBr₂
D) AlF₃
E) AlBr₃

What is the formula that this ionic compounds could form sr2+p3-o2-

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.

Compared with the freezing-point depression of a 0.01 m c6h12o6 solution, the freezing-point depression of a 0.01 m nacl solution is