What happens when hydrogen gas is passed over hot ferric oxide plzz help ​

What effect might melting sea ice have for people who live in coastal areas?

Me i dont know what to do! the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

Name the element in group 17, period 2. (periodic table)