Atomic weights: Helium = 4.0030, Hydrogen = 1.0080, Oxygen = 16.0000. Find the differences:
(a) Oxygen – Hydrogen
(b) Oxygen – Helium
(c) Helium – Hydrogen
(a) 14.9920
(b) 11.9970
(c) 2.9950
Subtract given values: (a) 16 – 1.0080 = 14.9920. (b) 16 – 4.0030 = 11.9970. (c) 4.0030 – 1.0080 = 2.9950.