To decide if a binary compound has ionic or covalent bonding, first locate the two elements concerned in the Periodic Table and decide if they are metals (shown in blue) or non-metals (shown in pink).o decide if a binary compound has ionic or covalent bonding, first locate the two elements concerned in the Periodic Table and decide if they are metals (shown in blue) or non-metals (shown in pink).
Area code 518 is a telephone area code in eastern upstate New York, established as one of the original area codes in 1947.t has 493 landline and 100 wireless exchanges serviced by 47 carriers. It is the largest area code in size in New York, extending from the eastern Mohawk Valley to the Vermont border, and from the Canadian border to south of Albany.
Basic info. Area code 678 is an overlay NPA and was introduced on January 6, 1998 as a result of a high demand for new telephone numbers in the Atlanta area. The code overlays both 404 and 770 NPAs. This new code's introduction also resulted in the change from 7 to 10 digit local dialing in these areas.rea code 678. The 678 area code belongs to the state of Georgia (GA) and some of the locations covered are Atlanta, Marietta and more: