Answer:
57) True
58) True
59) True
60) Fe and O
61) Sr and F
62) both ionic and covalent bonds
Explanation:
57) True: The sharing of valence electrons between atoms forms covalent bond and transferring of electrons forms ionic bond.
58) True: The bond between to non metals is always covalent bond.
59) True: The bond between a metal and a non metal is ionic bond. Here lithium is a metal and fluorine is non metal.
60) Fe and O: the bond between a metal and non metal is ionic bond. Here iron is a metal and oxygen is a non metal.
61) Sr and F: he bond between a metal and non metal is ionic bond. Here Sr is a metal and F is a non metal.
62) both ionic and covalent bonds:
With non metals a non metal forms covalent bonds
With metals a non metal forms ionic bonds.
