Question

2d. complete the following table by identifying how many valence electrons each element has and how that relates to the octet rule. (3 points)
element name valence electrons gains or loses electrons? how many? resulting charge
magnesium (mg)
gallium (ga)
selenium (se)

Explanation:

Step1: Determine Mg valence electrons

Magnesium is in group 2, so it has 2 valence electrons.

Step2: Analyze Mg electron - loss

To achieve an octet, Mg loses electrons. It loses 2 electrons.

Step3: Calculate Mg resulting charge

Losing 2 electrons gives a +2 charge.

Step4: Determine Ga valence electrons

Gallium is in group 13, so it has 3 valence electrons.

Step5: Analyze Ga electron - loss

To achieve an octet, Ga loses electrons. It loses 3 electrons.

Step6: Calculate Ga resulting charge

Losing 3 electrons gives a +3 charge.

Step7: Determine Se valence electrons

Selenium is in group 16, so it has 6 valence electrons.

Step8: Analyze Se electron - gain

To achieve an octet, Se gains electrons. It gains 2 electrons.

Step9: Calculate Se resulting charge

Gaining 2 electrons gives a - 2 charge.

Answer:

Element Name	Valence Electrons	Gains or Loses Electrons?	How many?	Resulting Charge
Gallium (Ga)	3	Loses	3	+3
Selenium (Se)	6	Gains	2	-2