Questions: Part D Calcium's atomic number is 20, It forms ions with 18 electrons. What is the electrical charge of a calcium ion? +1 +2 -1 -2

Part D Calcium's atomic number is 20, It forms ions with 18 electrons. What is the electrical charge of a calcium ion? +1 +2 -1 -2
Transcript text: Part D Calcium's atomic number is 20, It forms ions with 18 electrons. What is the electrical charge of a calcium ion? $+1$ $+2$ $-1$ $-2$
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Solution

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Solution Steps

Step 1: Determine the number of protons

Calcium's atomic number is 20, which means it has 20 protons.

Step 2: Determine the number of electrons in the ion

The calcium ion has 18 electrons.

Step 3: Calculate the charge

The charge of the ion is determined by the difference between the number of protons and electrons. Since there are 20 protons and 18 electrons, the ion has \( 20 - 18 = 2 \) more protons than electrons, resulting in a \( +2 \) charge.

Final Answer

\(\boxed{+2}\)

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