Cathy conducts a scientific investigation. how can she make sure her results are valid? a. repeat the investigation several times b. confirm that her results match her hypothesis c. write a report about her results d. use metric measuring units during her investigation pls it's science by the way.

Which atom or ion is the largest? 0 a. 0 0 0 0 e. li

Acontrol during an experiment. might change remains constant does not exist does change

Which of the following is a conclusion that resulted from ernest rutherford’s scattering experiment? (will mark brainliest) a. the nucleus is negatively charged b. the atom is a dense solid and is indivisible c. the mass is conserved when atoms react chemically d. the nucleus is very small and the atom is mostly empty space