6. Name 7 physical separation methods for mixtures and give two examples.
Filtration, distillation, chromatography, decantation, evaporation, centrifugation, sublimation. Ex: salt from water (evaporation), oil + water (decantation).
25. What is the charge of an atom with 12 protons and 10 electrons?
+2 charge.
13. What experiment did Rutherford conduct and what did he discover?
Gold foil experiment; discovered nucleus.
22. Calculate the number of protons in an atom with atomic number 17.
17 protons.
4. Give two examples of homogeneous mixtures.
Salt water, air.
30. How do solids, liquids, and gases differ?
Solids: fixed shape/volume. Liquids: fixed volume, no shape. Gases: no shape/volume.
28. How many protons does Cl⁻ have?
17 protons.
12. What was Thomson’s model of the atom called?
Plum pudding model.
33. How do pressure and temperature influence state changes?