The forward slipping movement of the body of one of the lower lumbar vertebrae on the vertebra or sacrum below it. spondylosis A degenerative disorder that can cause the loss of normal spinal structure and function.
The formula is MgâPâ. This is a reaction between a metal and a nonmetal. The product will be the ionic compound, magnesium nitride. Step 1. Identify the atomic symbols of the cation and anion. Magnesium is Mg and phosphide is P. Step 2. Identify the charge on each ion and place it on each symbol. Mg is in Group 2, so we write MgÂ²âº. P is in Group 15, so it needs 3 electrons to complete its octet.
Chemistry, Physics. the smallest physical unit of an element or compound, consisting of one or more like atoms in an element and two or more different atoms in a compound. 2. Chemistry. a quantity of a substance, the weight of which, measured in any chosen unit, is numerically equal to the molecular weight; gram molecule.