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What element is stable with 2 valence electrons?
Helium is stable with 2 valence electrons. It has a full outer electron shell, making it chemically inert and stable.
Why helium exist in the form of he not he2?
he2 is a fatty. He atom is a inert gas. so it can not react with any other atom or molecules to form any compounds.so He2 can't exist. ANOTHER ANSWER: Helium atom has only one shell i-e K-shell which can accommodate a maximum of two electrons which it already has. therefore Helium atom does not need any more electrons to become stable as it is already stable by duplet rule. Thus helium atom does not combine with another helium atom and hence exists as He and not He2.
What color does helium burn?
Helium does not burn. It is an extremely stable noble gas. Only in a nuclear reactor can it be made to react.
Why dont potassium and helium make an ionic bond?
Helium has a stable (full) valence shell (1s2) which means that it will have a high ionization energy (the energy required to remove an electron). In fact, helium has the highest ionization energy of any element. However, this does not mean that helium cannot form ions. It just means that it will require a lot of energy to do so and this does not happen under normal conditions.
How many valance electrons does helium have?
Helium has two valence electrons. It is the only noble gas not to have eight valence electrons. Helium has the electronic configuration 1s2.The Noble gases have eight valence electrons in their outer shell.
What is the octet rule and what does it have to do with bonding?
Most atoms tend to form the kind of bonds that will give them 8 electrons (an octet) in their outer shell, because that is a particularly stable arrangement. Exceptions are hydrogen and helium. Hydrogen's most stable arrangement is zero electrons (but it can also have 2) and helium has a stable arrangement of 2 electrons. the two lightest metals, lithium and beryllium, also have a stable electron arrangement of just two electrons. All other elements seek 8.
Is helium stable or unstable?
Helium is a stable element.
What is the half life of helium?
Helium-3 is stable.
Why do the emission spectra for hydrogen and helium differ?
The emission spectra for hydrogen and helium differ because each element has a unique arrangement of electrons in their atoms. This arrangement causes them to emit different wavelengths of light when excited, resulting in distinct spectral lines.
Which is the most stable out of the two Oxygen or Helium?
Helium is more stable, because it has completely filled valence orbitals.
How many electrons does it take for hydrogen and helium to become stable?
Helium is already stable. Hydrogen should gain or lose one electron to be stable.
Is helium unstable and also radioactive?
Helium is extremely stable and non radioactive
Can helium turn into air?
Helium cannot turn into anything, it is a stable element.
How many neutrons are in an atom he?
In total nine different isotopes of helium are known to exist. Helium 3 (one neutron) and helium 4 (two neutrons, by far the most common isotope) are the only stable isotopes. The other 7 isotopes (helium 2, 5, 6, 7, 8, 9, and 10) are unstable and rapidly decay into stable isotopes.
Why is a helium atom stable with only two electrons in its outermost energy level?
helium has completely filled valence orbitals and hence is stable
Is Helium the first element on the periodic table and the most stable element in the universe?
False (Hydrogen has the first position, Helium is the most stable)
Why is helium non reactant?
Helium has completely filled orbitals, hence it is stable and inert.
