Helium could be considered an element because there is no chemical or nuclear bonds between any of the atoms . Their outermost electron shells are full, with the first level only being able to hold two electrons. And helium, atomic number 2, only has 2 electrons.
8 февр. 2016 г.
27 февр. 2014 г. · Helium, on the other hand, always has 2 protons in the nucleus. It is an element because, except for splitting or combining atoms, it cannot be ... |
The helium is formed during the natural radioactive decay of elements such as uranium and thorium. These heavy elements were formed before the earth but they ... |
1 мая 2019 г. · Helium is a chemical element. Its official symbol is He, and its atomic number is 2, which means it has two protons in its nucleus. |
Helium is the second most abundant element in the universe after hydrogen. It is a colorless and odorless inert gas that has unique properties. |
Helium is an inert gas and does not easily combine with other elements. There are no known compounds that contain helium, although attempts are being made to ... |
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