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.
Composition of methane molecule: Methane molecule consists of one carbon and four hydrogen atoms (CH4). Geometry of methane: Methane molecule is tetrahedral in structure in which carbon is central atom and four H-atoms are surrounding it in three-dimensions. Bond Angles: HCH-bond angles are 109.5o.ue to this property, methane is used as a domestic and industrial fuel. CH4 + 2O2 CO2 + 2H2O HALOGENATION: Replacement of halogen atom with H-atom of an organic compound is called Halogenation. It is a substitution reaction. This reaction occurs in the presence of sun light. It is a free radical mechanism eaction.