Recall exactly how to find valence electrons for every atoms (except change and inner shift metals). Realize that steels will shed electrons to kind cations and also nonmetals gain electrons to form anions. Predict fees (using the modification Bohr model, Z Predict charges (using the modification Bohr model) because that the adhering to elements: phosphorus, nitrogen, sulfur, oxygen, and aluminum. Memorize charges for silver and zinc brand your regular table with predicted charges from Bohr model.

You are watching: What type of ion might sodium form? justify your answer.

Earlier, we situated the valence electrons for aspects Z

Figure $$\PageIndex1$$: Valentine image built from Pink Hearts structure from 365PSD.com and also photo of bill Nye through Gage Skidmore (CC-BY=SA 2.0).

## Cations

A neutral sodium atom is most likely to attain an octet in the outermost covering by shedding its one valence electron.

\<\ceNa \rightarrow Na^+ + e^-\>

The cation produced in this way, Na+, is called the salt ion to differentiate it from the element. The outermost shell of the sodium ion is the 2nd electron shell, which has actually eight electrons in it. The octet rule has to be satisfied. Number $$\PageIndex1$$ is a graphical depiction of this process.

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A item of lead, reduced through, is silvery for a quick time, before the surface ar oxidizes. This was the left item of the previous image, that was cut with a sharp knife, making use of a hammer. (CC by 3/0; http://images-of-elements.com/lead.php)

When command becomes a cation, it will certainly not it is in visible and can become water soluble. If lead ions get in a drinking water system, one would certainly not have the ability to detect them visually. For years, lead pipes were mounted to transport water to consumer in countless countries including the joined States. If corrosive water to be to enter a lead-based pipe, the would develop soluble lead ions. This charged types could it is in ingested unknowingly by inhabitants of the community. Clock the video clip below and also note exactly how lead has influenced the city of Flint, Michigan.

Follow-up inquiries

Why was the drinking water source changed from Lake Huron to Flint River? did the Flint river contain lead? If not, exactly how did the lead enter the drinking water? exactly how did the residents define their drinking water? please realize the discoloration of the water is because of excess iron and not lead. How deserve to lead damage the body? who does it influence the most? What might have been added to the water prior to releasing it to the pipes? Why did you think public official didn"t add this ptcouncil.netical? What were all the contaminants this video clip mentioned? just how did boil the water assist and ache the occupants of Flint, Michigan?

### Anions

Some atom have virtually eight electrons in their valence shell and also can gain extr valence electrons until they have actually an octet. As soon as these atoms acquire electrons, they acquire a an adverse charge because they currently possess an ext electrons than protons. Negatively charged ions are called anions. Many nonmetals become anions once they make ionic compounds.

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A neutral chlorine atom has seven electron in that outermost shell. Just one more electron is essential to attain an octet in chlorine’s valence shell. (In table salt, this electron comes from the sodium atom.)

\<\cee^- +Cl -> Cl^-\>

In this case, the ion has the very same outermost covering as the original atom, yet now that shell has eight electron in it. When again, the octet ascendancy has to be satisfied. The resulting anion, Cl−, is referred to as the chloride ion; keep in mind the slight adjust in the suffix (-ide instead of -ine) to create the surname of this anion. Figure $$\PageIndex2$$ is a graphical explicate of this process.

In countless cases, elements that belong to the same team (vertical column) ~ above the regular table kind ions with the same charge due to the fact that they have the same variety of valence electrons. Thus, the routine table i do not care a device for psychic the charges on countless ions. For example, all ions made from alkali metals, the first column top top the regular table, have a 1+ charge. Ion made from alkaline earth metals, the 2nd group ~ above the regular table, have actually a 2+ charge. ~ above the other side that the periodic table, the next-to-last column, the halogens, form ions having a 1− charge. Number $$\PageIndex3$$ shows exactly how the charge on many ions have the right to be predicted by the place of an element on the periodic table.