Calcium has an atomic number of 20. how many electrons does calcium lose when forming an ionic bond with another ion?

Calcium loses two electrons when forming an ionic bond with another ion. This is because calcium belongs to Group II of the Periodic Table of Elements. This means that it has two electrons in its outer shell. When forming an ionic bond with another element, Calcium can give up this two electrons. 

  the unit of the measure =

explanation:

  the property that is quantified by the energy needed per of material to raise the temperature by one.

  si unit of energy = joule (j)

  si unit of temperature = kelvin (k)

  si unit of mass of material = kilogram (kg)

the property that is quantified by the energy needed per of material to raise the temperature by one is called specific heat.

the unit of specific heat is