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.
A chemical formula is a way of expressing information about the proportions of atoms that constitute a particular chemical compound, using the standard abbreviations for the chemical elements, and subscripts to indicate the number of atoms involved.ny substance consisting of two or more different types of atoms (chemical elements) in a fixed proportion of its atoms (i.e., stoichiometry) can be termed a chemical compound; the concept is most readily understood when considering pure chemical substances.