86Se undergoes β– decay to 86Br with a half-life of 14.3 s. 86Br then undergoes β– decay to 86Kr, a — Nuclear Chemistry Chemistry Question

⁸⁶Se undergoes β– decay to ⁸⁶Br with a half-life of 14.3 s. ⁸⁶Br then undergoes β– decay to ⁸⁶Kr, a stable product. 0.100 g ⁸⁶Se was placed in a sealed vessel, and the masses of all three species were recorded over time as shown below. What is the half-life of ⁸⁶Br?