Question

question
what is the difference in the number of electrons between the calcium ion and elemental calcium?
provide your answer below:

□ electrons

Explanation:

Step1: Determine electrons in elemental calcium

Calcium (Ca) has an atomic number of 20. So, elemental calcium has 20 electrons.

Step2: Determine electrons in calcium ion

Calcium ion ($Ca^{2 +}$) forms by losing 2 electrons. So it has 20 - 2=18 electrons.

Step3: Calculate the difference

Difference = 20 - 18 = 2 electrons.

Answer:

2