Which is not a step in most scientific investigations? developing a hypothesis to explain collected data proving a theory and writing a new scientific law collecting data through observation and measurement observing and experimenting to test a hypothesis

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.

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.

Which property of a rock remains unchanged by mechanical weathering? a. total surface area b. size and shape c. mineral composition d. sharpness