IS As you move across the P. T., reactivity with H₂O. .
For example when
placed in H₂o, it
On the other hand
When its placed in th.
As you more
more down the P. T, reatuity with H20
For example when
placed in h20 it
On the other hand
when its placed in the h20

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pleaze mark brainliest!

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.