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Learn about polyatomic ions and common examples in this Khan Academy article.
Apply your knowledge of polyatomic ions in this set of free practice questions. Skip to main content If you're seeing this message, it means we're having trouble loading external resources on our website.
Lewis diagrams for atoms and ions are models that show the number of valence electrons (outermost electrons) they have. Lewis diagrams of atoms show the element's symbol surrounded by dots representing valence electrons. For monatomic ions, Lewis diagrams also includes brackets and the ion's charge.
Definition of formal charge, and how minimization of formal charge can help choose the more stable dot structure.
Learn what polyatomic ions are and how to write them in chemical formulas. Skip to main content If you're seeing this message, it means we're having trouble loading external resources on our website.
Given what I've told you, see if you can come up with the Lewis diagram for aluminum hydride. So aluminum hydride has one aluminum and three hydrogens. See if you can draw the Lewis diagram for that.
Communicate scientific and technical information about why the molecular-level structure is important in the functioning of designed materials. Activity: How does water form droplets on surfaces? Apply: electronegativity and bond polarity
Math: Pre-K - 8th grade; Pre-K through grade 2 (Khan Kids) Early math review; 2nd grade; 3rd grade; 4th grade; 5th grade; 6th grade; 7th grade; 8th grade; 3rd grade math (Illustrative Math-aligned)
If we want to visualize the valence electrons for, say, sodium we could do it with what's known as a Lewis dot structure or a Lewis electron dot structure, sometimes just called a dot structure for short.