What is a mixture? Different objects together but not chemically bonded 6 Types of What is a molecular substance? A substance made of lots substance molecules which are not bonded to each other What is a giant substance? A substance made of billions of atoms chemically bonded together Name five molecular Hydrogen, oxygen, water, carbon We will use these as substances dioxide and methane exemplars to keep coming back to 6-7 Chemical What is a chemical formula? A combination of symbols and This is actually started in formulae small numbers which tells you the previous lesson when which atoms are in a substance dealing with molecular substances What do the numbers in a The number of a certain element in chemical formula represent? a substance What is the chemical forumla H2 for hydrogen? What is the chemical formula O2 for oxygen? What is the chemical formula H2O for water? What is the chemical formula CH4 for methane? What is the chemical formula CO2 25 questions till now for carbon dioxide? What is the chemical formula N2 for nitrogen? What is air? A mixture of molecules, mostly This seems a little oxygen and nitrogen incongruous but is here to aid discussion of conservation of mass and specifically metal metal oxide 8 Chemical What is a chemical reaction? A process where atoms are Use carbon and oxygen as reactions rearranged into new substances an example as needs no balancing
What is a mixture? Different objects together but not chemically bonded 6 Types of substance What is a molecular substance? A substance made of lots molecules which are not bonded to each other What is a giant substance? A substance made of billions of atoms chemically bonded together Name five molecular substances Hydrogen, oxygen, water, carbon dioxide and methane We will use these as exemplars to keep coming back to 6-7 Chemical formulae What is a chemical formula? A combination of symbols and small numbers which tells you which atoms are in a substance This is actually started in the previous lesson when dealing with molecular substances What do the numbers in a chemical formula represent? The number of a certain element in a substance What is the chemical forumla for hydrogen? H2 What is the chemical formula for oxygen? O2 What is the chemical formula for water? H2O What is the chemical formula for methane? CH4 What is the chemical formula for carbon dioxide? CO2 25 questions till now What is the chemical formula for nitrogen? N2 What is air? A mixture of molecules, mostly oxygen and nitrogen This seems a little incongruous but is here to aid discussion of conservation of mass and specifically metal metal oxide 8 Chemical reactions What is a chemical reaction? A process where atoms are rearranged into new substances Use carbon and oxygen as an example as needs no balancing
c1-unit-outline.docx