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.
Area code 541 and overlay area code 458 serve Oregon, USA, excluding the northwestern corner. 541 & 458 includes: Bend, Corvallis, Eugene, Klamath Falls, Medford, Ontario, P â¦ endleton, The Dalles 503 & 971 includes: Portland, Salem, Astoria, Lincoln City, Tillamook.78 is one of the codes used in Atlanta, Georgia.   678 is a telephone area code assigned to metropolitan Atlanta,  Georgia and its suburbs and exurbs. This area code was â¦ first  assigned to customers signing up for new telephone service on  January 15, 1998.