What would you expect the combining ratio to be for alkali metals to be with a halogen? With oxygen?

Answer 1

The combining ratio for alkali metals and halogens is #1:1#.

The combining ratio for alkali metals and oxygen is #2:1#.

Alkali metals form #1^+# ions. Halogens form #1^-# ions. Oxygen forms #2^-# ions.

Ionic compounds are neutral, so the total positive charge has to equal the total negative charge.

Alkali metals plus halogens: potassium and chlorine

#"K"^+ + "Cl"^(-)##rarr##"KCl"#
The combining ratio for alkali metals and halogens is #1:1#.

Alkali metals plus oxygen: potassium and oxygen

#"2K"^+ + "O"^(-2)##rarr##"K"_2"O"#
The combining ratio for alkali metals and oxygen is #2:1#.
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Answer 2

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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Answer 3

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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Answer from HIX Tutor

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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