Coal and diamond are both minerals .they are both expensive. why

hard to find

Explanation:

because actually diamonds is coal.

Explanation:

how diamonds is coal? because when the coal gets very high pressure it turns into diamonds.

50.23 i believe is correct but don't quote me on that.

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.