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How many electrons does it take for hydrogen and helium to become stable?
Wiki User
∙ 11y ago
Helium is already stable. Hydrogen should gain or lose one electron to be stable.
Wiki User
∙ 11y ago
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How many extra valence electrons does helium need to become stable?
Helium has 2 valence electrons and has completely filled orbitals / shells and helium is stable.
Which atom does not need 8 electrons in it outer energy level to be stable?
hydrogen, helium, lithium, and beryllium
Is helium more reactive that magnesium?
No, helium is a noble gas, meaning it has a full outer electron shell. It does not need to gain or lose electrons to become stable, so it is almost completely inert. Hydrogen on the other hand, is extremely reactive as it only needs one electron to become stable. This is why the Hindenburg airship exploded, and why we use helium in similar craft today.
Why is helium atom more stable than hydrogen atom?
Hydrogen has 1 proton and 1 electron, helium has 2 protons, 2 neutrons and 2 electrons.
Why does helium not burn like hydrogen?
Helium does not burn because it is a noble gas with a full outer shell of electrons, this configuration is very stable so helium does not react easily if at all.
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.
Why is helium atomic number 2?
Helium's atomic number is 2 because it has 2 protons in its nucleus.
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.
How do hydrogen atoms make a covalant bond?
Two hydrogen atoms share their electrons; thus, both of them have two electrons each in their first shell and become stable.
What is the most stable number of valence electrons?
The most stable number of valence electrons is 2 for hydrogen and helium, which have only one electron shell in the shell model for atomic electron configurations, and 8 for all other elements.
How many valence electrons do stable atoms have?
A stable atom has 8 electrons in its outer most valence shell. A simple way to remember this is that all atoms want to be like the noble gases which all have 8 electrons (except helium but the reason is complicated and not necessary here)
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.
