case study ch 2

Question 1

the first shell :

Answer 1

2n to power 2
1x1=1
1x2=2
shell 1n can hold 2 electrons, shell 2n can hold 8 electrons, and shell 3n can hold 18 electrons

Question 2

ion charged

Answer 2

element with negative charge will gain electron
element with positve charge will lose electron

Question 3

to determine polar or nonpolar you need to measure electronegativity

Answer 3

electronegativity is higher on the top and on the right

Question 4

ionic bond

Answer 4

Question 5

Examples of Ionic Bond :

Answer 5

-Sodium Chloride (NaCl)
-Magnesium Oxide (MgO)
-Calcium Chloride (CaCl2)