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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if you're asking what comes out, it's steam.

they it depends on if one believes about radioactivity, they make a geiger counter beep but maybe it was going to beep anyway electronics do wierd things all the time or it was programmed to beep near certain metals.