The atomic number is 2 and the mass number is 4.
The period number is 1 and the group number is 18.
The group name is the noble gasses and gas is its state of matter.
The state of the element is a non-metal.
Helium is a very light element and when put in balloons they float.
Helium is used to cool the rocket engines once they have been launched.
Used in lasers since it is non-reactive.
even at high temperatures it will not bond with other elements.