Revision work form Chapter 1, 2 and 3 Chemistry G-7
Revision work Chapter 1, 2 and 3 Chemistry G-7 True and False. The particles move from an area of low concentration to an area of high concentration is called diffusion. F Molecules are groups of 2 or more atoms bonded together. T Elements contain only one type of atom. T Compounds contain 2 or more types of atom. T Chemists use a kind of short-hand to describe molecules. It's called the symbol. F Fill in the blanks. The particles move from an area of ---------------------- concentration to an area of low concentration is called diffusion. High Good scientists make sure their data provides evidence that is reliable and ---------------------------- . valid You can use existing theories to explain----------------------------. Ideas -----------------------tells us how near the true reading your measurement is. Accuracy I'm Elvis the Electron and I'm pretty quick, I fly round the nucleus at a fair old lick! The protons and I, we tend to attract, I'm -------...