Players read questions about energy levels and score points by picking the correct element as the answer. Electrons are in regions around the nucleus that are different distances away from the nucleus ...

Water molecules can break down into hydrogen ions and hydroxide ions. \(H_{2}O(l)\rightleftharpoons H^{+}(aq)+OH^{-}(aq)\) This is a reversible reaction. A small proportion of water molecules ...

Wearing blue rubber gloves, Molly Dobrow reached into a metal vat of diluted sodium hydroxide and pulled out two dripping-wet models of human organs: a heart and a set of lungs. Made of Elastico ...