Na and K are both metals and do not react
Na and Cl are metal and non metal respectively and will form ionic compound, NaCl or table salt or sodium chloride
Mg and Li are both metals and do not react
S and Cl are both non metals and will give covalent compounds
Metals.
Chloride and bromine are not likely to form an ionic bond because only one of them, chloride, is an ion.If the questioner meant chlorine and bromine, they are not likely to form an ionic bond with each other, because there is too little difference in their electronegativities. However, both of them are very likely to form ionic bonds with less electronegative elements, such as metals.
The least ionic type of bond is a covalent bond.
Ionic bond exist between metals and nonmetals.
A metal combining with a nonmetal gives you an ionic bond.
Metals.
... large difference in electronegativity.
Chloride and bromine are not likely to form an ionic bond because only one of them, chloride, is an ion.If the questioner meant chlorine and bromine, they are not likely to form an ionic bond with each other, because there is too little difference in their electronegativities. However, both of them are very likely to form ionic bonds with less electronegative elements, such as metals.
A metal and a nonmetal can form an ionic bond.
The least ionic type of bond is a covalent bond.
An ionic bond
Ionic bond exist between metals and nonmetals.
A metal combining with a nonmetal gives you an ionic bond.
The kind of bond that results when electron transfer occurs between atoms of two different elements can be considered covalent, polar covalent, or ionic. The type of bond will depend upon the identities of the elements and their electronegativity's.
Members of groups 1, 2, 6, 7 in the Periodic Table are most likely to form ionic compounds. It depends on what pair of elements are involved, for instance one rule of thumb is metal with nonmetal. Another, more systematic way, to assess this is to consider the difference in electronegativity between the two elements. If the electronegativity difference is 2 or more then the bond will be ionic. If the difference is less than 2 but more than 1.6 and one of the elements is a metal then there can be an ionic bond.
with bromine (Br)
If the difference in electronegativity between the elements is greater than 2 then the bond will be ionic, if its between 1.6 and 2 then it will be ionic if one of the elements is a metal.