What happens to the average kinetic energy of the molecules of a warm substance when the temperature of the substance is slightly decreased? It increases. It decreases. It becomes zero. It remains unchanged

Achange in the number of neutrons in an atom will change an blank . when the number of protons changes in an atom, a new element will form.

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.

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.