For the hypothetical compound ax2 which statement is true

a. a is a nonmetal from group 3, and x is a metal from group 1.

b. a is a metal from group 1, and x is a metal from group 7

c. a is a metal from group 3, and x is a nonmetal from group 5

d. a is a metal from group 2, and x is a nonmetal from group 7 < -- i believe this is correct.

Your friend offers to show you an intrusive igneous rock. which of the following would you expect to see?

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.

Apump contains 0.5 l of air at 203 kpa.you draw back on the piston of the pump, expanding the volume until the pressure reads 50.8 kpa. what is the new volume of the air pump