Classify each as the following: element, compound, or mixture: 1. helium 2. water 3.sodium 4. a sedimentary rock 5.salt 6.air

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