Which characteristics of metal atoms help explain why valence electrons in a metal are delocalized? Metal atoms are large and have high electronegativities.
Metal atoms are small and have low electronegativities.
Metal atoms are large and have low electronegativities.
Metal atoms are small and have high electronegativities.

Before it was launched, a helium-filled balloon had a pressure of 201 kpa at a temperature of 27°c. at an altitude of 15,000 m, the pressure had decreased to 2.5 kpa and the temperature had dropped to -14 °c. the volume of the balloon increased to 59.3 m3. what is the original volume of the balloon? 13 m3 0.85 m3 0.077 m3 1.17 m3