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In the modern Periodic Table, these elements belong to group 17. These elements have s2 p5 electron configuration. Hence they need one more electron from an electron donor to fulfill its valence shell to obtain noble gas configuration.
The elements in the group 7A has 7 electrons in their outermost energy level. They gain 1 electron to get the noble gas configuration. The elements in the group 7A are called halogens.
Wiki User
∙ 9y ago
Wiki User
∙ 9y agoIn the modern periodic table, these elements belong to group 17. These elements have s2 p5 electron configuration. Hence they need one more electron from an electron donor to fulfill its valence shell to obtain noble gas configuration.
Wiki User
∙ 11y agoGenerally they will gain 1 electron, rather than losing.But there are compounds in which the elements lose up to 7 electrons (as in HIO4, HClO4).
Wiki User
∙ 9y agoThe elements in the group 7A has 7 electrons in their outermost energy level. They gain 1 electron to get the noble gas configuration. The elements in the group 7A are called halogens.
Wiki User
∙ 12y agoit needs to gain 1 electron !
Wiki User
∙ 11y ago3
Wiki User
∙ 12y ago1 electron.
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What can you conclude about a ecosystem with many trophic levels?
it is a stable ecosystem
What determines an element's reactivity?
The electrons determine the reactivity. How many valence electrons there are. It is easier to lose one electron rather than three, so an element with one valence electron will be more reactive than one with three.
How many electrons does fluorine need to satisfy the octet rule?
One
How many nuetrons are in the element oxygen?
There are 8 neutrons in oxygen element because the no. of electrons are equal to the number of protons and oxygen element contain 8 electrons.
Which atom forms an ion by the loss of electrons?
idk but a chloride atom becomes a chloride ion wen it gains electrons so....
How many electrons does sulfur gain or lose to become stable?
Sulfur gains 2 electrons to become stable.
How many electrons does barium lose to become a stable octect?
Two electrons.
How many electrons must beryllium loose to become stable?
Beryllium is a stable element.
How many electrons are required in the outer energy level for most elements to be stable?
The noble gases is the most stable group of elements. They have their outer electron energy levels full, but the number of electrons vary according to which noble gas it is. They are group 18 on the periodic table.
How many electrons would fluorine have to gain or lose too become stable?
Fluorine has 7 valence electrons. In order to become stable, Florine will share 1 electron with another atom to get 8 electron and become stable.
How many electrons do barium need to lose to become stable?
2
What group is stable and will not bond?
Noble Gases are stable due to the "octet" rule (they have as many electrons as they can hold) and will not bond.
How many electrons does a magnesium atom need to lose to become stable?
2
Xenon is in group 0- how many electrons does it have in its outer shell?
Xe (Xenon) is in group 8, and therefore has a stable configuration of eight valence electrons.
How many valance electrons does nitrogen?
5 valence electrons because it needs to gain 3 electrons in order to become stable
How many more electrons does an atom of carbon need to complete its valence shell?
Carbon needs 4 valence electrons to satisfy it's outer energy level.
How many electrons an atom has lost gained or shared to become stable?
the oxidation number
