To determine the most likely ion that would be formed by each element listed, we need to consider their typical oxidation states based on their positions in the periodic table.
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Phosphorus (P): Typically, phosphorus can form a 3- ion (phosphide ion) when it gains three electrons.
- Answer: 3-
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Boron (B): Boron usually forms a 3+ ion as it can lose three electrons to achieve a stable electron configuration.
- Answer: 3+
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Chlorine (Cl): Chlorine typically forms a 1- ion (chloride ion) when it gains one electron.
- Answer: 1-
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Calcium (Ca): Calcium usually forms a 2+ ion as it loses two electrons to achieve a stable electron configuration.
- Answer: 2+
Thus, the answers are:
- Phosphorus: 3-
- Boron: 3+
- Chlorine: 1-
- Calcium: 2+