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How do you know what type of bond a compound is?

In chem i understand that ionic is metal and non metal and covalent is non metal and non metal. But if given a table with certain properties of each elemetn how are you supposed to know.
E.g the question is suggest the most likely type of bonding in neodymium fluoride?
you get a periodic table so you can quickly find out whether the two elements(in neodymium fluoride) are metal or non metal and you will immediately know the type of bonding there is
Original post by Lucy98654
In chem i understand that ionic is metal and non metal and covalent is non metal and non metal. But if given a table with certain properties of each elemetn how are you supposed to know.
E.g the question is suggest the most likely type of bonding in neodymium fluoride?

For a more accurate idea you can use the bonding triangle
https://chemed.chem.purdue.edu/genchem/topicreview/bp/materials/material1.html

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