Information+about+helium

Atomic Weight: 4.002602 Density: 0.0001663 g/cm3 Melting Point: 0.95K (-272.2 C or -458.0 F) Boiling Point: 4.22K (-268.93 C or -452.07 F) Phase at room temperature: Gas Element classification: Non-metal Reactivity: Un-reactive Period number: 1 Group number: 18 Group name: Noble Gas Color: Colorless Odor: Odorless Chemical symbol: He

When helium is put into a balloon the balloon starts to blow up into a cirlcular shape. It looks just like a balloon blown up with hydrogen. The only difference is that helium is able to make the balloon float, where hydrogen will not allow the balloon to float.