What is always included in a comparative investigation?
o a dependent variable
o an independent variable
o a hypothesis
o a scientific question

How many neutrons does element x have if it’s stormy umber is 33 and it’s mass number is 95?

All the simple machines make work easier to do by changing the or of a force. a. size; type b. work; type c. size; direction d. type; direction

Which is the best predictor of the radioactive nature of an isotope? o the proton-to-electron ratio the neutron-to-proton ratio o the neutron-to-electron ratio the electron-to-proton ratio