[tobycat2]

Simple question here, but it's a review question on a worksheet and I'm wondering if there is a trick to it since it seems obvious.

The question is: If you had 10 Cl atoms and 10 K atoms, how many molecules would form? At first thought I assumed he wanted us to just fill out the electron shell of Cl, sharing with K, until we ran out of atoms, thus giving us 2 molecules.

For some reason bohr shell model, balancing chem. equations, etc were fine for me but this just seemed worded funny.

Thanks for any help. First year chem student, e. science major

[opti384]

What will be formed from K and Cl?

[tobycat2]

potassium chloride, which is just KCl

[opti384]

How many number of atoms of K and Cl is required to form one molecule of KCl?

[tobycat2]

I'm thinking a compound like H2O has three atoms, so wouldn't KCL just have two atoms? But that doesn't seem like what he's asking...

[opti384]

At first thought I assumed he wanted us to just fill out the electron shell of Cl, sharing with K, until we ran out of atoms, thus giving us 2 molecules.

Then how much molecules of KCl can be formed from 10 K atoms and 10 Cl atoms?
I think you are misunderstanding something as you came up with the conclusion: 2 molecules

[tobycat2]

definitely.

The next question asks about 10 Be atoms and 10 Cl atoms, and then goes on to ask how many atoms (and which ones) would be left over.

[opti384]

Well it seems the objective is to check whether you know the ionic bonding or not. You can take the same step with Be and Cl as well.

[Borek]

More like aiming at limiting reagents.