Can anyone help me with a clue for question 18?
Chemically what connects Argentina,China,Iran,Ireland,Laos,Monaco,Nepal,Pakistan,Poland,Singapore.
Just a clue please. Thanks for any help.
I thought the two letter abbreviations for the countries represented a chemical element e.g. Argentina AR=ARGON but it doesn't work for four of the countries.
bit iffy ..can't think of a way to give a clue. here goes
countries 1 3 5 79 the first two letters are on the periodic table then every other country the first letter is used .