How many dots would a dot diagram for selenium, one of the group 16 elements, have?

Because selenium is in the 16th column on the periodic chart, it has 6 valence electrons. Thus, the Lewis structure (or electron dot structure) for selenium has 6 dots around it.

It will look similar to this without the underscores:

__.

. Se:

_. .

Explanation:

water at room temperature is flowing through a pipe with pressure taps located 10 ft apart along one section of the pipe, which are connected to a mercury (s=13.6) manometer.