One level back to Chemical substances 2.2.3.3.3.1. Chemical elements One level further to [Non-metals] One level further to [Semi-metals] (silicon, arsenic, antimony, boron, etc.) One level further to Metals [Non-metals] [Non-metals] 2.2.3.3.3.1.1. [Non-metals] One level further to [Chemical basic elements] One level further to [Reactive Elements]. One level further to [Noble gases] (Helium, Neon, Agrgon etc.) One level back to [Non-metals] 2.2.3.3.3.1.1.1. [Chemical basic elements] 2.2.3.3.3.1.1.1.1. Nitrogen 2.2.3.3.3.1.1.1.2. Oxygen and hydrogen 2.2.3.3.3.1.1.1.3. Carbon One level further to Nitrogen One level further to Oxygen and hydrogen One level further to Carbon One level back to [Non-metals] 2.2.3.3.3.1.1.2. [Reactive Elements]. 2.2.3.3.3.1.1.2.1. [Phosphorus] 2.2.3.3.3.1.1.2.2. [Sulphur] 2.2.3.3.3.1.1.2.3. [Halogens] One level further to [Phosphorus] One level further to [Sulphur] One level further to [Halogens] One level back to [Non-metals] 2.2.3.3.3.1.1.3. [Noble gases] [Semi-metals] (silicon, arsenic, antimony, boron, etc.) [Semi-metals] (silicon, arsenic, antimony, boron, etc.) 2.2.3.3.3.1.2. [Semi-metals] (silicon, arsenic, antimony, boron, etc.) Metals Metals 2.2.3.3.3.1.3. Metals One level further to [Metals as such] (aluminium, tin, lead, etc.) One level further to [Alkalis] One level further to [Transition metals] (gold, silver, iron etc.) One level back to Metals 2.2.3.3.3.1.3.1. [Metals as such] One level back to Metals 2.2.3.3.3.1.3.2. [Alkalis] 2.2.3.3.3.1.3.2.1. [Alkali metals ] 2.2.3.3.3.1.3.2.2. [Alkaline earths ] One level further to [Alkali metals ] (lithium, sodium, potassium, etc.) One level further to [Alkaline earths ] (berylium, magnesium, calcium etc.) One level back to Metals 2.2.3.3.3.1.3.3. [Transition metals]

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Chemical elements