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2. Year 7 - Wikipedia

   en.wikipedia.org/wiki/Year_7

   Year 7 is an educational year group in schools in many countries including England, Wales, Australia and New Zealand. It is the seventh full year (or eighth in Australia and England) of compulsory education and is roughly equivalent to grade 6 in the United States and Canada (or to grade 7 for the Australian Year 7). Children in this year are ...

3. Chemistry - Wikipedia

   en.wikipedia.org/wiki/Chemistry

   Chemistry is the scientific study of the properties and behavior of matter. [1] It is a physical science within the natural sciences that studies the chemical elements that make up matter and compounds made of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during reactions with other substances.

4. Extended periodic table - Wikipedia

   en.wikipedia.org/wiki/Extended_periodic_table

   This is an accepted version of this page This is the latest accepted revision, reviewed on 27 January 2025. Periodic table of the elements with eight or more periods Extended periodic table Hydrogen Helium Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon Potassium Calcium Scandium Titanium Vanadium Chromium ...

5. List of compounds with carbon number 7 - Wikipedia

   en.wikipedia.org/wiki/List_of_compounds_with...

   C 7 H 3 Br 2 NO: bromoxynil: 1689-84-5 C 7 H 4 ClFO 2-chloro-6-fluorobenzaldehyde: 387-45-1 C 7 H 4 ClNO 2: chloroxazone: 95-25-0 C 7 H 4 CrO 3 S: thiophene chromium tricarbonyl: 12078-15-8 C 7 H 4 CrO 3 Se: selenophene chromium tricarbonyl: 12078-16-9 C 7 H 4 CrO 3 Te: tellurophene chromium tricarbonyl: 39015-36-6 C 7 H 4 MnNO 3: azacymantrene ...

6. Reactivity series - Wikipedia

   en.wikipedia.org/wiki/Reactivity_series

   In chemistry, a reactivity series (or reactivity series of elements) is an empirical, calculated, and structurally analytical progression [1] of a series of metals, arranged by their "reactivity" from highest to lowest.

7. Properties of metals, metalloids and nonmetals - Wikipedia

   en.wikipedia.org/wiki/Properties_of_metals...

   The chemical elements can be broadly divided into metals, metalloids, and nonmetals according to their shared physical and chemical properties.All elemental metals have a shiny appearance (at least when freshly polished); are good conductors of heat and electricity; form alloys with other metallic elements; and have at least one basic oxide.