I'd say 8/10 or something.
Having come to the end of my A Level exams today, I can categorically say that chemistry was the most challenging subject i faced. That said, it was also the most enjoyable. The thrill of a concept clicking after hours of toil cannot be beaten! (infact it becomes so routine that you get you used to it in a way)
There's a little bit of memory and regurgetation needed, but this, in turn, becomes alot easier if you have understood the main concept frameworks and have questioned yourselves on these topics. For example, today in my last exam there was a 2 mark question on describing a test to show the presence of an alkene group. I was completely stumped since i hadn't memorised that reaction. However, I knew about the concept of addition of certain molecules (electrophiles) to unsaturated molecules, and then i remembered from a different time that Br2 reacted with an alkene group, hence an associated colour change may be the test. It turned out after the exam that i was right! So It dosen't depend entirely on memory.
So yeah, understand the basic concepts, practice, then memorise what you need to at the end. And then chemistry ain't so hard. It's pretty hard, but I don't regret taking it for a second.