A lithium atom has 3 protons, 4 neutrons and 3 electrons. How would the atom change to become an anion?

Word equation for k(s)+h2o(l) yield koh(aq) + h2(g)

What is a number added in front of a formula in order to balance the equation

Consider the reaction: 2al(s) + fe2o3(s) → al2o3(s) + 2fe(s) the δhf for fe2o3(s) = -824.3 kj/mole. the δhf for al2o3(s) = -1675.7 kj/mole. finish the equation. δhrxn = [(1)( kj/mole) + (2)( kj/mole)] - [(1)( kj/mole) + (2) ( kj/mole)]