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How many valence electrons does heluim need to have a filled outermost energy level?
Wiki User
∙ 11y ago
Helium only needs two electrons to have a filled outermost energy level.
Wiki User
∙ 11y ago
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How many electrons does carbon need to have the outermost energy shell filled?
Carbon needs to have 8 electron in its outermost shell to have it completely filled, 4 more valence electrons than it has in the neutral for of carbon.
How many valence electrons does helium need to gain to have a filled outermost energy level?
0 It already is full
Why do valence electrons determine the reactivity of an atom?
The valence electrons are the outermost electrons. In an atom, its lower energy levels have been filled and are therefore stable. But, except for the noble gases, the valence energy level is not filled, and therefore not stable. So atoms must undergo chemical reactions in order to fill their valence shells and become stable. They can do this by sharing electrons, transferring electrons, or by forming a sea of electrons shared by all the atoms.
What is special about the arrangement of electrons in the noble gases?
Noble gases have a full shell of valence electrons, therefore are unlikely to gain or lose any since they are stable.
Helium atoms only need how many valence electrons to have a filled outermost energy level?
Helium is already full. Helium atoms only need 2 electrons to be full, and Helium, as an element, already has 2.
The electrons that occupy the outermost filled shell are called?
Outer energy level electrons, or valence electron.
How many electrons does carbon need to have the outermost energy shell filled?
Carbon needs to have 8 electron in its outermost shell to have it completely filled, 4 more valence electrons than it has in the neutral for of carbon.
How many valence electrons does helium need to gain to have a filled outermost energy level?
0 It already is full
How many electrons are in the outermost energy level of carbon and how many does it need to have this energy level filled?
Carbon has four electrons in the outermost energy level, which is energy level two. It needs eight electrons to have this energy level filled.
Why do valence electrons determine the reactivity of an atom?
The valence electrons are the outermost electrons. In an atom, its lower energy levels have been filled and are therefore stable. But, except for the noble gases, the valence energy level is not filled, and therefore not stable. So atoms must undergo chemical reactions in order to fill their valence shells and become stable. They can do this by sharing electrons, transferring electrons, or by forming a sea of electrons shared by all the atoms.
How many valence electrons does helium need to have filled outermost energy level?
helium has 2 valence electrons (in s orbital) and has complete s orbital. So it does not need to gain or lose more electrons to be stable.
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
How many valence electrones does helium need to have a filled outermost energy level?
helium has 2 valence electrons (in s orbital) and has complete s orbital. So it does not need to gain or lose more electrons to be stable.
How many electrons does it need to have in the outermost energy level filled?
8 electrons
What is special about the arrangement of electrons in the noble gases?
Noble gases have a full shell of valence electrons, therefore are unlikely to gain or lose any since they are stable.
When atoms end up with eight or zero valence electrons how are they different from they were before?
they become stable as they have completely filled outermost valence shell and if they have no electron in their outermost shell they become non reactive.
What are the electrons in the outermost energy level of an atom are called?
Completely filled octet.
