S2 molecule has a double bond because each sulfur atom contributes two valence electrons and they share two electrons to form a covalent bond. This allows each sulfur atom to achieve a stable octet configuration and satisfy the octet rule.
Molecular formulae that must contain a double bond in order to satisfy the octet rule are those of compounds like O2, HCN, and CO2.
The octet rule.
An atom of selenium will gain two electrons to achieve an octet because it has six valence electrons in its outer shell. By gaining these two electrons, selenium will have a total of eight electrons in its outer shell, fulfilling the octet rule.
The octet rule states that atoms tend to gain, lose, or share electrons in order to have a full outer shell of eight electrons (or two electrons for hydrogen and helium). This stable electron configuration is similar to the noble gases.
A potassium atom has 1 electron in its outer shell. In order to satisfy the octet rule, it needs to donate 7 electrons to another atom to reach a stable configuration with a full outer shell.
Atoms are not sentient. They undergo chemical bonding and chemical reactions in order to have lower energy, which makes them stable. Typically this means either sharing electrons to get an octet of electrons, or transferring electrons so they get an octet of electrons. This is not a conscious decision on their part.
S2 molecule has a double bond because each sulfur atom contributes two valence electrons and they share two electrons to form a covalent bond. This allows each sulfur atom to achieve a stable octet configuration and satisfy the octet rule.
Molecular formulae that must contain a double bond in order to satisfy the octet rule are those of compounds like O2, HCN, and CO2.
No, O2 does not satisfy the octet rule because as we know octet rule states that an atom has to have 8 e- in the outer shell. Oxygen has 6 valence electrons, the bonds should be 8-6=2 bonds. So we need 2 more covalent bonds to form an octet.
Octet Rule: In order for atoms to become more stable, they will take electrons, lose electrons, or share electrons so that their outer shell/level will contain eight electrons and be complete.
Silicon needs to gain 4 more electrons to have a stable octet. It has 4 valence electrons and aims to have a full outer shell with 8 electrons, following the octet rule.
The octet rule.
This atom must gain 3 electrons to achieve an octet.
An atom of selenium will gain two electrons to achieve an octet because it has six valence electrons in its outer shell. By gaining these two electrons, selenium will have a total of eight electrons in its outer shell, fulfilling the octet rule.
The octet rule states that atoms tend to gain, lose, or share electrons in order to have a full outer shell of eight electrons (or two electrons for hydrogen and helium). This stable electron configuration is similar to the noble gases.
The atom simply donates, gains, or shares electrons in order to either reach its octet or reduce its electronegativity