No piercing is considered fully healed until it's a year old. Contrary to what you may read, it takes the body a full year to season a piercing to the point where it can be removed for extended periods of time without the risk of the piercing closing.
HBr is polar. The Lewis structure shows a central carbon atom forming four single covalent bonds with the four terminal bromines. The central carbon has no lone pairs and four bonding pairs, so the molecular geometry is tetrahedral (as is the electron geometry), and bond angles are thus approximately 109.5 degrees.
Benzene is the archetypical aromatic compound. It is planar, bond angles=120Âº, all carbon atoms in the ring are sp 2 hybridized, and the pi-orbitals are occupied by 6 electrons. The aromatic heterocycle pyridine is similar to benzene, and is often used as a weak base for scavenging protons.urthermore, cyclooctatetraene has 8 Ï-electrons, a number not consistent with the Hueckel HÃ¼ckel. Rule benzene is the archetypical aromatic. Compound it is, planar bond=angles, 120Âº all carbon atoms in the ring are sp 2, hybridized and the-pi orbitals are occupied by 6. electrons