Of the elements pt v li and kr which is a nonmetal

Krypton is non metal.

Explanation:

The difference between a metal and non metal is that metals are ready to give electrons to attain half filled or full filled electron stability.

Non metal are reluctant to give electrons.

Out of the given choices

a) Pt : platinum is a transition metal.

b) V : Vanadium is a transition metal.

c) Li: Lithium is an alkali metal

d) Kr : Krypton is a non metal. It is a noble gas with full filled stability.

Answer is: Kr (krypton).

Krypton is a chemical element with symbol Kr and atomic number 36.

Krypton has 36 electron and 36. It is noble gas (group 18).

Noble gases are in group 18: helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe) and radon (Rn). They have very low chemical reactivity.

Platinum (Pt), vanadium (V) and lithium (Li) are metals.