Which metal element is most reactive Beryllium, magnesium, calcium, or strontium

Which of two curves exhibits exponential growth

What is the number of neutrons in an atom with atomic mass of 35

What would be the original temperature of a gas that has a volume of 2.0 l and a pressure of 2.0 atm and an unknown temperature that the volume increased to 3.5 l in its pressure decreased to 1.0 atm if the final temperature is measured to be 11°c