In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
Q: This element has a characteristic D line at 589 nanometers and is produced in the electrolytic Castner process. The movement of this element is counteracted by the movement of potassium in a namesake "pump" based off of active transport. A strong base containing hydroxide and this metal is known as lye while baking soda consists of a compound containing this metal and bicarbonate. For 10 points, name this alkali metal found along with chlorine in table salt.
A:
Science