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Helium's atomic number is 2 because it has 2 protons in its nucleus.
Wiki User
∙ 11y ago
Wiki User
∙ 11y agoHelium has completely filled orbitals, hence it is stable.
Hydrogen has half filled s orbitals and is less stable.
Wiki User
∙ 12y agoStrictly, a helium atom has no valence electrons. The outer electron shell is completely filled when there are two electrons.
Wiki User
∙ 11y agoHelium - it is a noble gas! Helium has completely filled s orbital and thus has stable electronic configuration
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What is the atomic number for helium?
The atomic number of Helium is 2.
What is the atomic number of a helium atom?
The atomic number of Helium is 2 because there are 2 protons and 2 electrons.
What is the atomic number of helium's outer shell?
The outer shell of helium does not have an atomic number, that number belongs to helium itself whose atomic number is 2.
What is the element number for helium?
Helium's atomic number is 2.
What does the number 2 indicate in helium?
2 is the atomic number (or the number of protons) of helium.
What is the atomic number for helium?
The atomic number of Helium is 2.
What is the atomic number of this element helium?
The atomic number of helium (He) is 2.
What is Atomic number 2?
Atomic number 2 is Helium, which has the symbol He
What is helium's atomic?
Helium's atomic number is 2 and its atomic mass is 4
What is the atomic number of a helium atom?
The atomic number of Helium is 2 because there are 2 protons and 2 electrons.
What is the atomic number and mass of helium?
Helium is a metal element. Atomic number of it is 2.
What is the atomic number of helium's outer shell?
The outer shell of helium does not have an atomic number, that number belongs to helium itself whose atomic number is 2.
What is the element number for helium?
Helium's atomic number is 2.
What does the number 2 indicate in helium?
2 is the atomic number (or the number of protons) of helium.
4.002 is the atomic mass of which element?
We can find helium as a non metal element. Atomic number of it is 2.
What is the atomic number of this element of He?
The atomic number of Helium is 2.
What is the atomic number of ununtrium to the power of the atomic number of helium?
The atomic number of ununtrium is 113; the atomic number of helium is 2. 1132=12 769
