1) Protons have what kind of charge? 2) Electrons have what kind of charge?
3) Neutrons have what kind of charge?

Choose all the answers that apply. ionic compounds dissolve easily in water do not dissolve in water have low melting points have high melting points conduct electricity when melted

When the mercury level in a barometer decreases that atmospheric pressure has

Why does ammonia, nh3, behave as a base when it reacts with an acid? z