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
The second type of covalent bond is the polar covalent bond. This is where the two atoms in the covalent bond are not the same and the attraction to the electron pair is not equal. The atom with the greater attraction pulls the bonding electrons towards them. As a result, the atom takes on a partial negative charge.