Question

apply 3. how many valence electrons does magnesium (mg) have? 2 4. how many valence electrons does sulfur (s) have? 5. how many valence electrons does neon (ne) have? 6. which elements do not form bonds? extended the goal of the octet rule is to have a complete outer energy level. this can be accomplished by either filling the shell to reach 8 or by removing one electron to get a filled second - level. by doing so, the atom will have the small - est amount of energy. 7. if an atom has two valence electrons, would they more likely to gain six or lose two electrons?

Explanation:

Step1: Recall valence - electron rules

Valence electrons are the electrons in the outermost shell of an atom. The octet rule states that atoms tend to gain, lose, or share electrons to have 8 electrons in their outer - most shell (except for hydrogen and helium).

Step2: Determine valence electrons of Mg

Magnesium (Mg) has an atomic number of 12. Its electron configuration is 1s²2s²2p⁶3s². The outermost shell is the third shell with 2 electrons. So, Mg has 2 valence electrons.

Step3: Determine valence electrons of S

Sulfur (S) has an atomic number of 16. Its electron configuration is 1s²2s²2p⁶3s²3p⁴. The outermost shell is the third shell with 6 electrons. So, S has 6 valence electrons.

Step4: Determine valence electrons of Ne

Neon (Ne) has an atomic number of 10. Its electron configuration is 1s²2s²2p⁶. The outermost shell is the second shell with 8 electrons. So, Ne has 8 valence electrons.

Step5: Identify non - bonding elements

Noble gases like Ne have a complete octet in their outer shell and are very stable. They do not form bonds easily. So, Ne does not form bonds readily.

Answer:

1. Magnesium (Mg) has 2 valence electrons.
2. Sulfur (S) has 6 valence electrons.
3. Neon (Ne) has 8 valence electrons.
4. Neon (Ne) does not form bonds.