Chemistry Basics 0.0 / 5 ? ChemistryAtoms and compoundsGCSEEdexcel Created by: polly177Created on: 23-07-18 17:09 How many different atoms have been discovered by humans? 118 1 of 11 What are atoms? the smallest pieces of elements that can exist 2 of 11 What is a compound in terms of atoms? atoms that have been chemically combined together 3 of 11 What is the minimum amount of different types of elements in a compound? at least 2 4 of 11 What are the four key features of a chemical reaction? 1. compounds are broken up or formed 2. at least one new substance is created 3. there is a measurable energy change 4. n 5 of 11 What are reactants? the chemicals reacting in a chemical reaction 6 of 11 Which side of a chemical equation are the reactants put? the left-hand side 7 of 11 What are the products? the chemicals that are forming in a chemical reaction 8 of 11 Which side of a chemical equation are the reactants put? the right-hand side 9 of 11 What must symbol equations be? balanced 10 of 11 Why must symbol equations be balanced? because atoms can't be created or destroyed 11 of 11
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