Which nonmetal is the "wrong" place on the periodic table?

The correct answer is: Hydrogen

Explanation:

The periodic table is defined as the tabular arrangement and classification of the chemical elements. This table contains seven rows, called periods; and eighteen columns, called groups.

Generally, the metals are present on the left and the non-metals are present on the right of the periodic table.

However, Hydrogen (atomic number 1) is the only non-metal that is placed in group 1, on the left-side of the periodic table. This is because according to the electronic configuration of hydrogen (1s¹), it should be placed in group 1 of the periodic table.

alkaline metals are lithium, sodium, rubidium, potassium, cesium and francium.

alkali metals have electronegativity from 0.7 to 1, lowest in periodic table of elements, which means that alkali metals (i group in periodic table) has positive oxidation number in compounds.

electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

alkaline metals (far left in main group) have lowest ionizations energy and easy remove valence electrons,

for example, potassium is the alkali metal and has a single valence electron in the outer electron shell.

electron configuration of potassium is: ₁₉k 1s²2s²2p⁶3s²3p⁶4s¹.

they can not exist alone in nature, because they are very reactive.