Question

Which of the following are likely to form an ionic bond?

copper atoms
hydrogen atoms
hydrogen and oxygen atoms
copper and fluorine atoms

Answer 1

hydrogen atoms form covalent bonds

Answer 2

depends if you know the number of electrons and protons and it is:

odd it will definitely bond with one hydrogen atom

even it will bond with with two hydrogen atoms

so, odd will bond with odd

even will bond with even

hope this helps