Okay this may seem strange. But I've got my GCSEs starting in less than 10 days and revision is boring me so I thought why not mix revision for my 9 science exams with my two favourite casualty characters.

I also have a slight obsession with loving chemistry. But shh :)

And if your doing your exams as well it may ho you revise as well :) xx

Please review xx

Katie xx

It was a Sunday evening and Max and Zoe were sitting on the sofa. Zoe had some program on the TV that Max wasn't remotely interested in. He was on Zoe's iPad.

"Zoe I have a question."

"This sounds dangerous."

"Very funny. May I continue."

"Yes go on."

"When I was at school I never really understood the difference between covalent and ionic bonding I was wondering if you could explain it to me the teachers were never very patient."

"Max seriously. And what makes you think I have any more patience than them."

"Well I was kinda replying on the fact that you love me."

"Whatever gave you that idea." Zoe smiled back. Max looked at her and smiled. He then kissed her.

"You shouldn't kiss your teacher."

"Oh shhh. Can we get on with this chemistry lesson."

"Yes. Well covalent bonding happens between non-metals where the atoms share pairs of electrons. To form simple covalent molecules, for example water. They have low melting and boiling points due to the fact that they have weak intermolecular forces of attraction. And ionic bonding happens between a metal and a non-metals. The atoms gain and lose elections from their outer shells. They do this to have a full outer shell. So if they lose an electron they become positively charged ions and if they lose electrons they become negatively charged ions. These ions are then arranged in an ionic lattice, there is a strong electrostatic force of attraction between oppositely charged ions. Meaning they have night melting and boiling points. And as the ions aren't free to move they can't conduct electricity unless molten or aqueous (in solution)."

"Okay I get that part but doesn't diamond and graphite have a special name."

"Oh yeah they are called giant molecular covalent substances. And graphite has 3 covalent bonds so it as a free electron so can conduct electricity and its layers are free to side so it makes a good lubricant. Where as diamond has 4 covalent bonds so doesn't conduct electricity and is very hard so makes good cutting tools. Both have very high melting and boiling points."

"Okay most of that went over my head. But I get the difference now. It was like being back at school."

"You did ask."

"That's true I did. And now I want to know more, what else do you know. I was always confused in science at school."

"Well the rest of my knowledge will have to wait for another day. After that I need some sleep."

Zoe lay onto Max and her stroked her hair, before kissing her on the forehead.

"Come on sleeping beauty, bed time."

Max took a reluctant Zoe by the hand and lead her into bed.

The both fell under the covers and Zoe snuggled into Max. Her head resting just below his chin. He kissed her head before the light was turned off.

"Night princess, I look forward to the next lesson."

Please review xx

If I get enough positive feedback back i will carry this on :)xx