QQuestionChemistry
QuestionChemistry
"Give the symbol, including the correct charge, for each of the following ions.
(a) Barium ion"
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Answer
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Step 1:: Recall the charge on a barium ion
Barium is an element in the periodic table with the atomic number 56, which means it has 56 protons in its nucleus. In a neutral atom, the number of protons equals the number of electrons. However, when a barium atom loses two electrons to form a barium ion (Ba^2 +), it no longer has a neutral charge. The charge on the ion is equal to the difference between the number of protons and the number of electrons.
Step 2:: Determine the charge on the barium ion
Since a barium ion has lost two electrons, it has 56 protons and 54 electrons. Therefore, the charge on the barium ion is: charge = number of protons - number of electrons charge = 56 - 54 charge = 2 Since the charge is positive, we write it as a superscript on the right side of the ion symbol:
Final Answer
The symbol for the barium ion is Ba^2 +.
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