Which of the following atoms or ions does not have a filled outer subshell? caszn2+s2ca2+

The atoms or ions which does not have a filled outer subshell are: S (sulphur)

To determine which atoms or ions does not have a filled outer sub-shells, we must identify the electron configuration of each atom or ion as follows;

Evidently, the only atom which does not have a filled outer sub-shell is Sulphur, S atom.

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when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.