Helium is the second element in the periodic table. Its period number is 1 and it is apart of group number: 18. The group that Helium falls under is the Noble Gases. The element has an atomic number of 2, an atomic mass of 4 and is classified as a non-metal. It is the second most abundant element in the universe. Helium was discovered on the sun before it was found on the earth. In 1895, Pierre-Jules-César Janssen, a French astronomer and Norman Lockyer, an English astronomer both who discovered the element helium; found out about it while studying the solar eclipse where they found a yellow line surrounding the sun's spectrum. Lockyer named this substance helium. Helium is gas that has a very low density of 0.0001785kg/m3, which means it is lighter than air. It is mainly used in balloons and Zeppelins. Due to Helium’s low temperature the element
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They are the most common two out of the nine isotopes that Helium has. Isotopes are two or more forms of the same element. An isotope contains equal numbers of protons but have a different number of neutrons in their nuclei. Hence, isotopes differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element. Many elements only have one stable element. The main isotope of Helium is 3He. 3He (He-3) is a light, non-reactive isotope. It has two protons and one neutron, in contrast with two neutrons in common helium. He-3 first hypothetical existence was first anticipated in 1934 by an Australian Scientist who specialized in nuclear physics; Mark Oliphant. Helium-3 is slightly different than the common helium gas that fills balloons. In fact, the isotope Helium-3 is missing a neutron, with this missing neutron it allows for the production of clean energy.
Helium-3 Nuclide Data:
Isotope: Mass/Da Natural Abundance (atom %) Nuclear Spin (I) Magnetic Moment (μ/μN)
He-3 3.016 029 309 7(9) 0.000137 (3) 1/2
They are the most common two out of the nine isotopes that Helium has. Isotopes are two or more forms of the same element. An isotope contains equal numbers of protons but have a different number of neutrons in their nuclei. Hence, isotopes differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element. Many elements only have one stable element. The main isotope of Helium is 3He. 3He (He-3) is a light, non-reactive isotope. It has two protons and one neutron, in contrast with two neutrons in common helium. He-3 first hypothetical existence was first anticipated in 1934 by an Australian Scientist who specialized in nuclear physics; Mark Oliphant. Helium-3 is slightly different than the common helium gas that fills balloons. In fact, the isotope Helium-3 is missing a neutron, with this missing neutron it allows for the production of clean energy.
Helium-3 Nuclide Data:
Isotope: Mass/Da Natural Abundance (atom %) Nuclear Spin (I) Magnetic Moment (μ/μN)
He-3 3.016 029 309 7(9) 0.000137 (3) 1/2