Read "the ozone hole" and answer the question below. use examples from the article to explain one positive and one negative effect that chemistry has had on society.

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.

Identify the electromagnets with poles that are reversed from the electromagnet shown above

Which element is the least metallic between cadmium, silver, zinc, or iron?