Chapter 1 - The Periodic Table

Question	Answer
Atomic Weight	The historical term that was used before relative atomic masses were defined in the 20th century.
Periodic Table	An arrangement of elements in the order of their atomic numbers, forming groups and periods
Alkali Metal	Elements in group 1 of the periodic table, e.g. lithium (Li), sodium (Na), potassium (K)
Transition Element	Element from the central block of the periodic table It has typical metallic properties and forms a coloured compound
Relative Atomic Mass	The average mass of the atoms of an element compared with carbon-12 (which is given a mass of exactly 12) The average mass must take into account the proportions of the naturally occurring isotopes of the element
Group	All the elements in each column (labelled 1 - 7 and 0) down the periodic table

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	Created by rosetinley about 11 years ago