Which radiation can only be stopped by thick layers of dense metal? (2 points)

alpha

beta

gamma

position

Harvey kept a balloon with a volume of 348 milliliters at 25.0˚c inside a freezer for a night.  when he took it out, its new volume was 322 milliliters, but its pressure was the same.  if the final temperature of the balloon is the same as the freezer’s, what is the temperature of the freezer? the temperature of the freezer is  kelvins.

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)

In the space, show a correct numerical setup for calculating the number of moles of co2 present in 11 grams of co2