The half-life of an element is 200 years. if a 30 gram sample was originally deposited, how much is left after 200 years? question 2 options: 10 grams 15 grams 30 grams 60 grams pls i need an a

Acetic acid, hc2h3o2, dissolves and completely dissociates in water and a solvation sphere of water molecules forms around the ions. this solute-solvent interaction

Why does his teacher ask him to balance the equation by including the correct coefficient

Select all of the statements which are true. electrons are located in shells or orbits around the atom. electrons orbit slowly around the atom. electrons travel in one flat path around the nucleus of an atom. the valence of an atom is determined by the number of electrons in the atom's outermost shell.