In a short paragraph, explain one thing you've learned from the course this year.

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.

In 2002, the rare earth elements mine in mountain pass, california was closed because

Draw the lewis dot structure for each of the following polyatomic ions