Helium (He) Noble Gas
Helium (He) is a colorless, odorless noble gas with two protons, two neutrons, and two electrons, known for being very stable and non-reactive.
Helium (He) is the first noble gas on the periodic table, as it is colorless, odorless, non-toxic, and inert with an atomic number of 2. It is the universe's second lightest and most abundant element after hydrogen. Its key properties include exceptionally low boiling and melting points, inability to solidify at conventional pressures, and lack of chemical reactivity due to a complete outer electron shell.