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.
Best Answer: The molecular geometry simply refers to the shape of the molecule without taking into account the lone pairs of electrons, which is what your professor was asking. Tetrahedral is the geometry when the lone pairs are considered, called the electron-pair geometry.Source(s):etrahedral is the geometry when the lone pairs are considered, called the electron-pair geometry.