Which TWO statements describe the ocean floor giving brainliest plz help and explain

What is important to study for nios grade 12 chemistry? i have only one month left.

What’s the percent by mass of carbon in c10h14n2

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.