Topic 1: COMPOUNDS and CHEMICAL EQUATIONS.

Question	Answer
True or false? The PROPERTIES of a COMPOUND are always similar to those of the ELEMENTS that make it up.	False. COMPOUNDS often have totally different properties to the original ELEMENTS?
How many CARBON ATOMS are there in a MOLECULE of CALCIUM CARBONATE, CaCO₃	There is one CARBON ATOM in a MOLECULE of CaCO₃. (plus one CALCIUM ATOM and three OXYGEN ATOMS).
Are REACTANTS found on the left-hand side or the right-hand side of a CHEMICAL EQUATION.	They are found on the left-hand side.
What is a COMPOUND?	A COMPOUND is a SUBSTANCE formed from 2 or more different ELEMENTS in FIXED PROPORTIONS, held together by CHEMICAL BONDS.
2 ATOMS of ALUMINIUM (Al) will REACT with 3 ATOMS of OXYGEN (O) to FORM 1 MOLECULE of ALUMINIUM OXIDE. No other products are FORMED. What is the FORMULA of ALUMINIUM OXIDE? BaNa2

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	Created by Catherine Helen Claisse over 5 years ago