Answer
The ball will sink
Work Step by Step
Volume of ball = $\frac{4}{3} \times \pi \times r^{3}$
=> volume = $\frac{4}{3} \times 3.14 \times 0.50^{3}$
=> volume = 0.52 cm$^{3}$
Density = $\frac{mass}{volume}$
=> Density of ball = 2/0.52 = 3.84 g/mL
Since the density of ball is 3.84 g/mL which is higher than that of water ball will sink.
