COMPOUNDS

5.8 -

All compounds are electrically neutral.

Remember these three points:

1. In section 4.9.1, we learned that metals tend to lose their valence electrons to form cations.
2. In section 4.9.2, we learned that nonmetals tend to gain electrons to form anions.
3. In section 4.5, we learned that when an ion is formed, the number of electrons that is gained or lost is determined by the octet rule.

Click here to review the charge of ions that representative elements tend to form.

Follow these simple steps to write chemical formulas for ionic compounds. The steps are the same whether the compound contains simple ions of Group A elements or polyatomic ions.

	(section 5.8.1)
	(section 5.8.2)

Click onand find the icon to learn the names, formulas and charges from the list of polyatomic ions for this course.


Section 6.9
Writing Formulas ..p147

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