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You are watching: Does calcium gain or lose electrons
Calcium and chlorine reaction to form the ionic link calcium chloride, which has actually the formula `CaCl_2` .
Calcium loses two electrons, forming the cation `Ca^(2+)` and also each chlorine atom profit one electron, creating the anion `Cl^-` . Confident ions are called cations and negative ions are called anions. Once an...
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Calcium and also chlorine reaction to form the ionic compound calcium chloride, which has actually the formula `CaCl_2` .
Calcium loses 2 electrons, creating the cation `Ca^(2+)` and each chlorine atom profit one electron, creating the anion `Cl^-` . Confident ions are called cations and negative ions are referred to as anions. Once an facet loses electron to type an anion the ending of the surname is readjusted to -ide, i m sorry is why the link is called calcium chloride and also not calcium chorine.
The formula is based upon the reality that ionic compounds are neutral, or have actually an equal amount of positive and an adverse charge. Because the calcium ion has two hopeful charges and the chlorine ion has one an adverse charge, the formula `CaCl_2` results in two positive and two an adverse charges for a net charge of zero.
Now let"s look at why calcium loses two electrons and chlorine gains one. When elements react to kind compounds, they gain, shed or share electron to accomplish the same number of valence (outer) electrons as a noble gas. This is dubbed the Octet Rule, since all noble gases other than helium have actually eight external electrons. Helium only has two. Noble gases are stable (don"t reaction easily) due to the fact that they have actually a finish outer power level the electrons. Calcium atoms have actually 20 electrons of which two are valence electrons. Once a calcium atom loses 2 electrons it ends up v the same variety of electrons as argon, i m sorry is a secure noble gas. Chlorine has 17 electron of i m sorry 7 room valence electrons. When in profit one electron it also has the same number together argon.
Here"s the pattern because that ions formed by key group facets according come the Octet Rule:
Group 1A facets have one valence electron i m sorry they lose to form +1 ions.
Group 2A facets have two valence electron and type +2 ions.
B and also Al in team 3A have three valence electron and form +3 ions.
Elements in the carbon family type molecular (covalently bonded) compounds more often the ionic compounds..
Elements in team 5A, the nitrogen family, have 5 valence electrons and also gain 3 to kind -3 ions.
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Elements in team 6A, the oxygen family, have actually six valence electrons and gain 2 two to form -2 ions.
Elements in team 7A, the halogens, have seven valence electrons and gain one come from -1 ions.