What bond does the element Ba-O have covalent or ionic?

Answer 1

You should check the electronegativity values of Ba and O. The difference between these two will tell you what type of bond you are dealing with. A table of these values are found in a standard chemistry textbook.

However, as a rule of thumb, alkali and earth-alkali metals such as Ba, Ce, Na etc. very often form ionic bonds.

However, you should NEVER refer to something like Ba-O or NaCl or H2O as an element! Elements are the fundamental building blocks, that is, only one element, like Fe (iron). Two or more elements form a chemical substance.

Answer 2

The bond between barium (Ba) and oxygen (O) in Ba-O compounds is usually considered ionic. This is because of the large electronegativity difference between barium and oxygen, leading to the transfer of electrons from barium to oxygen and the formation of ionically bonded Ba2+ and O2- ions.

Answer 3

covalent