Which isotope completes this nuclear reaction?

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?

Which of these features are formed when hot groundwater is forced out through cracks in the earth's surface?

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