How many electrons are in an ion of calcium (Ca2+)?The Periodic TableA.22B.0C.18D.2SUBMITarrow_backPREVIOUS
Question
How many electrons are in an ion of calcium (Ca2+)?The Periodic TableA.22B.0C.18D.2SUBMITarrow_backPREVIOUS
Solution
Calcium (Ca) is the 20th element on the periodic table, meaning it has 20 electrons in its neutral state. However, the question refers to a calcium ion with a charge of 2+ (Ca2+). This means it has lost 2 electrons.
So, to find the number of electrons in Ca2+, you subtract the charge of the ion (2) from the total number of electrons in a neutral atom of calcium (20).
20 - 2 = 18
So, the correct answer is C. 18.
Similar Questions
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