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
Bond polarity is a useful concept for describing the sharing of electrons between atoms. 1  A nonpolar covalent bond is one in which the electrons are shared equally between two atoms. 2  A polar covalent bond is one in which one atom has a greater attraction for the electrons than the other atom.