Final answer:
It is true that a Brønsted-Lowry base is a proton acceptor, as per the definitions provided by the theory proposed by chemists Johannes Brønsted and Thomas Lowry in 1923.
Step-by-step explanation:
True, a Brønsted-Lowry base is indeed a proton acceptor, often symbolized by B. According to the Brønsted-Lowry theory of acids and bases proposed in 1923, a Brønsted-Lowry acid is defined as a proton (hydrogen ion) donor, while a Brønsted-Lowry base is a proton acceptor. This distinction is crucial for understanding acid-base reactions, such as the reaction between ammonia and water, where ammonia (NH₃) acts as a base and accepts a proton from water (H₂O), forming ammonium (NH⁴+) and hydroxide (OH⁻) ions.