21 of 44 Patterns: metals and non-metals on the right (except hydrogen) Where are these different types of elements grouped together in the periodic table? metals non-metals between metals and non-metals semi-metals on the left and centre Can you name a semi-metal element? Semi-metals have some properties similar to metals and other properties similar to non-metals.
29 of 44 Patterns, atomic number and electrons What links atomic number and the properties of elements? The periodic table shows that patterns in the properties of elements are linked to atomic number. atomic number = number of protons atomic number = number of electrons number of protons = number of electrons Electrons! As atomic number increases by one, the number of electrons also increases by one. This means that the elements in the periodic table are also arranged in order of the number of electrons.
42 of 44 Glossary atomic number – The number of protons in an atom. Sometimes called the proton number. electron arrangement – A shorthand way of writing the number of electrons in an atoms electron shells. element – A substance made up of only one type of atom. group – A column in the periodic table containing elements with the same number of outer shell electrons and similar chemical properties. period – A row in the periodic table containing elements with the same number of full electron shells. periodic table – The table that lists all the elements in order of increasing atomic number, arranged into groups and periods. property – Any characteristic of an element.