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Le Tableau Périodiqu
The Periodic Table
Question | Answer |
---|---|
The Periodic Table | a tabular arrangement of the chemical elements according to atomic number as based on the periodic law. |
Groups | each vertical column in the table. |
Periods | the rows across the table. |
Alkali Metals | a series of chemical elements forming Group 1 (IUPAC style) of the periodic table: lithium (Li), sodium (Na), potassium (K), rubidium (Rb), caesium (Cs), and francium (Fr). |
Alkaline Earth Metals | a series of elements comprising Group 2 (Group IIA) of the periodic table: beryllium, magnesium , calcium , strontium , barium and radium. |
Halogens | a series of nonmetal elements from Group 17. |
Noble Gases | a group of chemical elements with very similar properties: under standard conditions, they are all odourless, colourless, monoatomic gases, with a very low chemical reactivity. |