1. Ca Ca Ca Cl Cl Cl Cl Cl Cl Cl Cl Cl
#3) Draw dot structure of Ca (show 2 valence electrons as dots.)
Method 1, using clockwise rule, fill the top 2 electrons first, then add an electron to the sides and bottom one at a time clockwise.
Method two: Memorize group 2 has a pair of dots. Ca Ca Ca
#4) Draw dot structure of Cl (show 7 valence electrons as dots)
Method 1, using clockwise rule, fill the top 2 electrons first, then add an electron to the sides and bottom one at a time clockwise.
Method two: Memorize group 17 has a 3 pair of dots and a single Cl Cl Cl Cl Cl Cl Cl Cl Cl

2. [ ] [ ] Ca Ca+2 + 2e- - Cl Cl 2e- + - Cl Cl Ca Ca+2 + - Cl Cl 2 2
#5) Draw dot structure of Calcium Chloride, (ionic compound)
Electronegativity of Ca is 1.0 and Cl is 3,2 therefore the ionic character is 2,2, IONIC Ca
Ca+2 +
2e- - Cl Cl 2 2
2e- + [ ] - Cl Cl Ca
Ca+2 + [ ] - Cl Cl

3. [ ] Ca Ca+2 + 2e- - Ol O 2e- + -2 Ca O Ca+2 + O 2 2
Electronegativity of Ca is 1.0 and Cl is 3,2 therefore the ionic character is 2,2, IONIC Ca
Ca+2 +
2e- - Ol O 2 2
2e- + [ ] -2 Ca O
Ca+2 + O