A 38.6 kg marble slab is shown above. What is it’s density? Give you’re answer to the nearest tenth

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.

The number at the end of an isotope’s name is the number.

Which sample at stp has the same number of atoms as 18 liters of ne at stp