What happens to an atom when it gets oxidized?
A. It’s oxidation state increases
B. It’s atomic number increases
C. its oxidation state decreases
D. It’s ionic charge decreases

A. It’s oxidation state increases

Explanation:

A chemical reaction that involves the moving of electrons is known as oxidation. In oxidation, an atom, molecule, or ion loses one or more electrons in a chemical reaction.

When oxidation occurs, an element loses electrons and its oxidation number increases (becomes more positive), this means the oxidation state of the chemical species increases.

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.

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.