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Krypton, and any other elements in the last column of the Periodic Table besides helium.
The element with a full valence shell of 8 electrons is a noble gas, such as neon (Ne), argon (Ar), or krypton (Kr). These elements have achieved a stable electron configuration by filling their outermost energy level with electrons.
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What element has a stable 2 valence electrons?
The element with a stable 2 valence electrons is helium. Helium has a full outer electron shell with 2 electrons, making it very stable and unreactive.
Which shell determines the chemical property of an element?
The outermost shell of an element, called the valence shell, determines the chemical properties of the element. The number of electrons in the valence shell influences how atoms bond with other atoms to form molecules.
Why does oxygen behaves only as a divalent element?
Oxygen typically exists as a divalent element because it has six valence electrons in its outer shell. By gaining two electrons, it can achieve a full valence shell, similar to the stable noble gases.
How many more valence electrons does magnesium need to have a full outer valence shell?
Magnesium needs to gain two more electrons to have a full outer valence shell. This would give it a stable octet like the nearest noble gas, neon.
How with 5 valence electrons will achieve a full set of valence electrons?
An atom with 5 valence electrons can achieve a full set by gaining 3 electrons to fill its outer shell, creating stability. This can be achieved through ionic bonding with elements that can donate electrons, such as those with 3 valence electrons, like boron.
Is the element reactive or satble how do you know?
If the element has a full valence shell, such as the noble gases, then it is unreactive. It the element is missing few valence electrons of has few valence electrons, then the element is very reactive, such as the sodium.
Which elements is less reactive an element whose atoms have seven valence electrons or an element whose atoms have eight valence electrons?
the element with seven valence electrons will be more reactive. The reason for this is that elements want to always want to have a full valence shell (they always want 8, like a noble gas). The element with eight valence electron is happy with its full shell and will not want to get rid of any electrons.
What is the symbol for one element that DOES NOT need eight electrons to have full set of valence electrons?
An element that does not require eight electrons for a full set of valence electrons is represented by the element symbol B. Boron only needs six electrons to complete its valence shell and achieve stability.
What element has a stable 2 valence electrons?
The element with a stable 2 valence electrons is helium. Helium has a full outer electron shell with 2 electrons, making it very stable and unreactive.
Which shell determines the chemical property of an element?
The outermost shell of an element, called the valence shell, determines the chemical properties of the element. The number of electrons in the valence shell influences how atoms bond with other atoms to form molecules.
Why does oxygen behaves only as a divalent element?
Oxygen typically exists as a divalent element because it has six valence electrons in its outer shell. By gaining two electrons, it can achieve a full valence shell, similar to the stable noble gases.
The tendency of an element to react chemically is closely related to what?
its Atomic Mass.
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.
What are atoms valence electrons?
the electrons on their outer shell, all atoms want to gain a full valence shell.
How many more valence electrons does magnesium need to have a full outer valence shell?
Magnesium needs to gain two more electrons to have a full outer valence shell. This would give it a stable octet like the nearest noble gas, neon.
How many more valence electrons does oxygen need to have a full outer?
Oxygen needs 2 more valence electrons to have a full outer shell. Oxygen has 6 valence electrons, and a full outer shell for oxygen is achieved at 8 valence electrons.
What is an outer shell of an element?
The outer shell is the valence electrons and they are very loosely bound to the nucleus - less force by the nucleus on the valence electrons, so valence shell's electrons are exchanged first in any reaction.Valence
