Atoms and Elements 0.0 / 5 ? ChemistryAtoms and compoundsGCSEAQA Created by: holly.preston12345Created on: 23-08-18 08:16 Give three examples of an element: Cobalt (Cu) Iron (Fe) Oxygen (O) 1 of 20 If you combine atom of different elements what do they create? Compounds 2 of 20 How many elements does a compound contain? A compound contains at least 2 different elements 3 of 20 Give an example of a compound? Combining sodium (Na) atoms and oxygen (O) atoms produces sodium oxide 4 of 20 How do we represent a compound? We can represent a compounds by combining the chemical symbols of the 2 elements e.g (Na and O) to create the chemical formula Na2O 5 of 20 Chemical Reaction s 6 of 20 What are the key features of a chemical reaction? Compounds are broken up or formed, at least 1 new substance is created, measurable energy change and no atoms are created or destroyed 7 of 20 Chemical Equations s 8 of 20 What are the reactants? The reactants (the chemicals that are reacting) are on the left-hand side 9 of 20 What are the products? The products (the chemicals that are forming) are on the right-hand side 10 of 20 Why must symbol equations be balanced? Because atoms aren't created or destroyed during chemical reactions 11 of 20 What are the 2 types of chemical equations? Symbol Equations and Word Equations 12 of 20 When you combine different atoms what does it create? Combining different atoms creates different compounds 13 of 20 What does a compound contain? At least 2 different elements 14 of 20 What makes sodium oxide? Combining sodium (Na) atoms and oxygen (O) atoms produces sodium oxide 15 of 20 What is the word equation for sodium oxide? Sodium + oxygen → sodium oxide 16 of 20 What are all substances made out of? Atoms 17 of 20 How is a compound formed? By a chemical reaction 18 of 20 Define element: A substance made from only one type of atom 19 of 20 Define compound: A substance made of two or more mixtures 20 of 20
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