Which group of elements are considered to be in the same family?
a. helium, neon and argon
b. potassium, calcium and scandium
c. manganese, iron and cobalt
d. hydrogen and helium

24. a sports ball is inflated to an internal pressure of 1.85 atm at room temperature (25 °c). if the ball is then played with outside where the temperature is 7.5 °c, what will be the new pressure of the ball? assume the ball does not change in volume nor does any air leak from the ball a) 0.555 atm b) 1.74 atm c) 1.85 atm d) 1.97 atm