Knowing the chemical properties of a substance will tell you how a substance

Which best explains why an iceberg floats?

What is the mass defect of a mole of nuclei with 1.8 x 10^15 j/mol binding energy?

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.