Domanda del libro di testo
(a) Define atomic number and mass number.
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(a) Define atomic number and mass number.
Consider an atom of 10B. (d) Are either of the atoms obtained in parts (b) and (c) isotopes of 10B? If so which one?
(a) Which two of the following are isotopes of the same element: 3116X, 3115X, 3216X?
(b) Which of these can vary without changing the identity of the element?
Consider an atom of 63Cu. (a) How many protons, neutrons, and electrons does this atom contain?
Consider an atom of 63Cu. b. What is the symbol of the ion obtained by removing two electrons from 63Cu?