Find the indicated sum for the arithmetic series S14 for -6-1+4+9

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.

Chemistry worksheet - i am not sure what they are asking for exactly?

Which statement best describes what happens when molecular compounds melt