NO LINKS air contains about 78% nitrogen and 21% oxygen. Based on this information, one can conclude that air?
A. is a pure substance.

B. is a mixture of at least two gases.

C. consists of different states of matter.

D. consists of components that are chemically joined.

Explanation:

consists of different tattatta

the seeing the electronic configuration we can say that the element is fluorine.

fluorine is the most electronegative element in the periodic table.

but by only seeing the configuration we cannot say about its reactivity because we don't know if its configuration after excitation or by addition of electrons.

but if not then, it is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. as the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine.