Which law states that the pressure of a gas is inversely proportional to its volume at constant temperature?Correct Answer: Boyle's Law ! Other People SaidBoyle's Law: 1000 Charles's Law: 84 Avogadro's Law: 96 Next Question: What is the main reason for the periodic trends in atomic size across a period? (Variant 6)Increase in the number of energy levelsIncrease in nuclear chargeIncrease in electron repulsion