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 868 (TNT) was created during a split from the original Area code 809 around 1 June 1997. By 31 May 1998 all calls placed to the Republic of Trinidad and Tobago required the use of the +1 868 prefix.t is regulated by the government 's Telecommunications Authority, which holds responsibility for telecommunications. Due to a long established affiliation with NANP, phone numbers in the Republic of Trinidad and Tobago are often styled as (868) NXX-xxxx .