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They are lost. If it has a plus sign beside the ion charge, that means the atom loses electrons. But if it has a negative sign for the ion charge, that means that the atom gains electrons.

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How many electrons are gained or lost when selenium forms an ion?

Since Selenium is a Chalcogen (meaning it's in group 6A on the Periodic Table), it gains 2 electrons to form an ion with a charge of -2.


What do the oxidation numbers 2 and -2 imply?

+2 implies that 2 electrons are lost by the element. -2 implies that 2 electrons are gained by the element


What do the oxidation numbers of 2 and -2 imply?

+2 implies that 2 electrons are lost by the element. -2 implies that 2 electrons are gained by the element


What happens to substance when it is oxidized?

Oxidation is the loss of electrons. Reduction is the gain of electrons. The oxidizing agent is reduced. The reducing agent is oxidized. Cu goes from 0 to +2, it lost electrons S went from +6 to +4, it gained electrons I went from 0 to +5, it lost electrons N went from +5 to +4, it gained electrons.


What ion would be formed from oxygen how many electrons would be lost or gained?

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Will electrons be gained or lost if the atom of oxygen becomes stable?

the atomic no of oxygen is 8 to reach the nearest noble gas electronic configuration it excepts 2 electrons and becomes isoelectronic to Neon.


How many electrons are gained or lost in strontium?

Strontium (Sr) typically loses two electrons to achieve a stable electron configuration. This occurs because strontium is an alkaline earth metal located in Group 2 of the periodic table, and it readily forms a +2 cation (Sr²⁺) by losing its two outermost electrons. Therefore, strontium loses two electrons during chemical reactions.


What is the number of electrons that were lost gained to form Mg2 plus?

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What are two ways electrons can be gained or lost from an atom?

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Indicate the number of electrons lost or gained by calcium and give the charge of the ion it forms?

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How does the oxidation number indicate if an electron will be lost or gained?

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What is the charge of an atom that has lost two electrons?

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