Elements in increasing electronegativity krypton strontium lead bromine copper cesium

HI!

The correct order would be:

(least electronegative) Cesium -> Strontium -> Copper -> Lead -> Bromine -> Krypton (most electronegative)

Electronegativity is that chemical property of an atom that describes its tendency/ability to attract an electron to itself. The higher the electronegativity of the atom, the more its tendency to attract an ion to itself, increasing the likelihood of forming a negative ion in a compound. The difference in the electronegativity values of two atoms forming a compound can help indicate the type of bond that will form between them: covalent or ionic. If the difference is greater than 2, the bond found to be ionic.

The electronegativity values of the atoms in the question are as follows:

CsCesium0.79

SrStrontium   0.95

CuCopper1.90

PbLead2.33

BrBromine2.96

KrKrypton3.00

Hope this helps!

- lead + phosphoric acid = hydrogen + lead(ii) phosphate