One isotope of a metallic element has a mass numberof 65 and has 35 neutrons in the nucleus. The cationderived from the isotope has 28 electrons. Write thesymbol for this cation.2.52 In which one of these pairs do the two species resem-ble each other most closely in chemical properties?(a) 11H and 11H1, (b) 147N and 147N32, (c) 126C and 136C.2.53 This table gives numbers of electrons, protons, andneutrons in atoms or ions of a number of elements.(a) Which of the species are neutral? (b) Which arenegatively charged? (c) Which are positivelycharged? (d) What are the conventional symbols forall the species?
đang được dịch, vui lòng đợi..