He+y−10e Comparing the mass number, 232 = 208 + 4x + 0 4x = 232 - 208 = 24 x = 6 Comparing the atomic number, 90 = 82 + 2x - y Substitute the value of x 90 = 82 + 12 - y y = 4 ∴ Number of α - particles emitted = 6 Number of β - particles emitted = 4