We’re being asked to determine number of electrons in the ions given. Recall that the symbol for an element or ion is as follows:
What are the numbers of electrons, sequentially, in each of the following ions?
Ca2+, Fe2+, I-, O2-
a) 20e-, 26e-, 53e-, 8e-
b) 18e-, 26e-, 54e-, 8e-
c) 22e-, 28e-, 52e-, 6e-
d) 18e-, 24e-, 54e-, 10e-
e) 20e-, 20e-, 53e-, 8e-
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What scientific concept do you need to know in order to solve this problem?
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