This is a chemical element. You can find the how many electron in a single atom by using a Periodic Table.
There are two pairs of nonbonding electrons in a carbonate ion, CO32-. Each oxygen atom has two lone pairs of electrons, while the carbon atom does not have any nonbonding electrons in the ion.
Chromium lose 6 or 3 electrons.
Selenium may lose 2, 4 or 6 electrons and may gain 2 electrons.
Iodine tends to gain one electron when it forms an ion.
Strontium will lose 2 electrons to form a 2+ ion.
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The charge on a carbonate ion is -2; therefore, the ion has two more electrons than protons.
2-
There are two pairs of nonbonding electrons in a carbonate ion, CO32-. Each oxygen atom has two lone pairs of electrons, while the carbon atom does not have any nonbonding electrons in the ion.
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Aluminum will lose 3 electrons to form Al3+ ion.
it will lose 3 electrons
Chromium lose 6 or 3 electrons.
A sulfur atom gains 2 electrons when it becomes a sulfide ion.
Selenium may lose 2, 4 or 6 electrons and may gain 2 electrons.
Selenium typically gains two electrons to form an ion with a charge of -2.
One, and only one.