Interpretation:
Elements that can have only two electrons in their electron-dot structures needs to be identified.
Concept introduction:
Dots in electron dot structure represents number of valence electron present in an atom.
Answer to Problem 98A
Explanation of Solution
Helium, Calcium, Cobalt and Barium are the only elements in the given lot to have
Therefore these elements have only two electrons in their electron-dot structures
Hydrogen and lithium has
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