Covalent or molecular compounds contain atoms held together by covalent bonds. These bonds form when the atoms share electrons because they have similar electronegativity values. Covalent compounds are a diverse group of molecules, so there are several exceptions to each ‘rule’.
Do molecules share or transfer electrons?
The Octet Rule requires all atoms in a molecule to have 8 valence electrons–either by sharing, losing or gaining electrons–to become stable. For Covalent bonds, atoms tend to share their electrons with each other to satisfy the Octet Rule.
Why are electrons shared in molecular compounds?
Why are electrons shared in molecular compounds? Electrons are shared so that each element satisfies the octet rule. … Counting the groups of electrons that are shared pairs and lone pairs determine the electron geometry and bond angle forming its shape.
Why are electrons transferred?
Electrons are not affected by the strong force, and so they only get trapped by the electrical attraction to the nucleus which is much weaker in ionized atoms. Therefore it is easier for electrons to move away from one atom to another, transferring charge.
Is a hydrogen bond?
Hydrogen Bonding. Hydrogen bonding is a special type of dipole-dipole attraction between molecules, not a covalent bond to a hydrogen atom. It results from the attractive force between a hydrogen atom covalently bonded to a very electronegative atom such as a N, O, or F atom and another very electronegative atom.
What are the general properties of molecular compounds?
Physical Properties of Molecular Compounds
|Property||Ionic Compounds||Molecular Compounds|
|Physical state at room temperature||Solid||Gas, liquid, or solid|
|Water solubility||Usually high||Variable|
|Melting and boiling temperatures||Generally high||Generally low|
|Electrical conductivity||Good when molten or in solution||Poor|
What defines a molecular compound?
Molecular compounds are inorganic compounds that take the form of discrete molecules. Examples include such familiar substances as water (H2O) and carbon dioxide (CO2). Ionic compounds are formed when metal atoms lose one or more of their electrons to nonmetal atoms. …