Calcium is element number 20 on the Periodic Table. As an ion it has a +2 charge. How many electrons does a calcium ion have?A20B4C22D18
Question
Calcium is element number 20 on the Periodic Table. As an ion it has a +2 charge. How many electrons does a calcium ion have?A20B4C22D18
Solution
Calcium, as an element, has 20 electrons. However, when it becomes an ion with a +2 charge, it means it has lost 2 electrons. Therefore, a calcium ion has 18 electrons. So, the correct answer is D18.
Similar Questions
Calcium (Ca) has an atomic number of 20. It can form an ion by losing 2 electrons. What would its charge be?A.2+B.22C.18D.2–
How many electrons are in an ion of calcium (Ca2+)?The Periodic TableA.22B.0C.18D.2SUBMITarrow_backPREVIOUS
If Calcium has 20 electrons and a mass number of 42, it would be classified as an and would have electrical charge equal to (enter a numerical answer with a charge sign in front of the number if necessary).
An ion formed from an atom has a 4+ charge. The number of electrons present in the ion is 21 and the number of neutrons is 30. Identify the element.
Complete the table to show the maximum number of electrons in each shell1 2 3 4Up to calciumBigger than calcium
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.