The radioactive particle that is positively charged and has two protons and two neutrons is the?

Which of the following mining methods disrupts the sea floor?

When the mercury level in a barometer decreases that atmospheric pressure has

Iron (fe) reacts with copper sulfate (cuso4) to form iron (ii) sulfate. in this reaction, cu2+ gains electrons to form cu. which statement is true about this reaction? fe(s) + cuso4(aq) → feso4(aq) + cu(s)