What would you expect the combining ratio to be for alkali metals to be with a halogen? With oxygen?
The combining ratio for alkali metals and halogens is
The combining ratio for alkali metals and oxygen is
Ionic compounds are neutral, so the total positive charge has to equal the total negative charge.
Alkali metals plus halogens: potassium and chlorine
Alkali metals plus oxygen: potassium and oxygen
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Alkali metals all have a single valence electron, and halogens have a single missing one, so they would combine in a 1:1 ratio.
Oxygen requires two more valence electrons to complete its shell, so it would combine in a 2:1 ratio.
Elements combine (react) to form more stable compounds based on their electronic structure – specifically the valence electrons.
Groups 1, 2, and 17 (halogens) have only one more stable configuration, and Group 16 have a primary configuration, but may also have additional ones. The “transition metals” have a variety of possible stable electronic configurations with other elements. https://tutor.hix.ai
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When alkali metals and halogens combine, the resulting ionic compound is called a halide; when oxygen is added, the resulting oxides are usually oxides with a 2:1 ratio, like potassium oxide (K2O) or sodium oxide (Na2O).
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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
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