How do you know if a substance can undergo a chemical change?

Why is permeable soil best for plants that need a lot of drainage?

This drawing shows a human body system. what is the primary function of this body system?

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.