When two atoms bonded by a covalent bond have the same electronegativity the electrons will be equally shared. This is called pure (non-polar) covalent bonding. For example, the chlorine molecule, Cl 2.or example, sodium (a metal) combining with chlorine (a non-metal). Covalent, polar covalent and ionic bonding can be considered as forming a spectrum.As the difference in electronegativity increases the bonds become more polar then ionic. 1  Page. 2  1. 3  2. 4  3.
For the vein, see Superficial temporal vein. In human anatomy, the superficial temporal artery is a major artery of the head. It arises from the external carotid artery when it bifurcates into the superficial temporal artery and maxillary artery. Its pulse is palpable superior to the zygomatic arch, anterior and superior to the tragus.
Temporal artery biopsy. A temporal artery biopsy is most commonly used to test for giant cell arteritis. During the procedure, the skin on the side of your head is numbed with a local anaesthetic. An incision is made close to the hairline in front of your ear, and a small sample of your temporal artery is removed.he most common symptom of giant cell arteritis (GCA) is a headache, although some people also experience jaw pain and vision problems. The symptoms usually develop quite quickly, although many people report other symptoms, such as weight loss or tiredness, for weeks or months beforehand.