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

Question

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

2 Answers

Impact of this question

17143 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2017-03-10T01:54:01

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

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

Explanation:

Alkali metals form $1^{+}$ $1^+$ ions. Halogens form $1^{-}$ $1^-$ ions. Oxygen forms $2^{-}$ $2^-$ ions.

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

Alkali metals plus halogens: potassium and chlorine

$K^{+} + {Cl}^{-}$ $"K"^+ + "Cl"^(-)$ $\to$ $rarr$ $KCl$ $"KCl"$

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

Alkali metals plus oxygen: potassium and oxygen

${2K}^{+} + O^{- 2}$ $"2K"^+ + "O"^(-2)$ $\to$ $rarr$ $K_{2} O$ $"K"_2"O"$

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

Answer 2 · 2017-03-10T02:28:08

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.

Explanation:

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://www.webelements.com/

Science

Math

Humanities

... and beyond

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

2 Answers

Explanation:

Explanation:

Related questions

Impact of this question