Two representations of the distribution of electrons in the potassium atom are shown. Which model is useful in showing the reactivity of potassium?
D. Both models because each shows an electron in the outermost shell.

The chemical equation below shows the reaction of sodium (na) and chlorine (cl) to form sodium chloride (nacl). 2na + cl2 → 2nacl in this equation, which of the following is a reactant? i. sodium ii. chlorine iii. sodium chloride

The footprints of a dinosaur and the burrow of an ancient shrimp are examples of which kind of fossils

Which of the following is described by the equation h2o(s)+ heat=h2o(i) a freezing melting condensing evaporating