Meningioma; Synonyms: Meningeal tumor: A contrast-enhanced CT scan of the brain, demonstrating the appearance of a meningioma: Specialty: Neurosurgery: Symptoms: None, seizures, dementia, trouble talking, vision problems, one sided weakness: Usual onset: Adults: Types: Grade I, II, III: Risk factors: Ionizing radiation, family history: Diagnostic method
A polar covalent bond shares electrons unequally. Because of this unequal sharing, one end of the molecule is slightly positive, and the other end slightly negative. Edit
So why do... show more I thought that since the difference in electronegativity is only 0.02, that AsH3's bonds are covalent. Since AsH3 is covalent, the electrons are shared evenly so no dipole results. A polar bond refers to an unequal sharing of electrons and a polar molecule needs to have polar bonds.wo possible reasons As is under N and NH3is a prime example of a polar molecule As has a tetrahedral orbital geometry, but a pyramidal molecular geometry. That means there is an unshared electron pair with a negative charge hanging off one side of the molecule.