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Fluorine (symbol F) is a chemical element that is very poisonous. It is the most reactive element on the Periodic Table. Its atomic number (which…

The oxidizing agent can have two meanings. It is a reactant that removes electrons from other reactants during a redox reaction. It means a reactant…

The Potala Palace is a dzong fortress, immense religious and administrative complex in Lhasa, southern Tibet Autonomous Region, southwestern China. It was the winter palace…

Central Bank Central bank means a financial system allows one institution to control its money supply and interest rates. It is the number one bank of…

The Colosseum or Coliseum (/ˌkɒləˈsiːəm/ KOL-ə-SEE-əm), also called Flavian Amphitheatre (Latin: Amphitheatrum Flavium; Italian: Anfiteatro Flavio (aɱfiteˈaːtro ˈflaːvjo) or Colosseo (kolosˈsɛːo)), giant amphitheatre built in…

An acidic oxide reacts with water and produces acid. They are also called acid anhydride, which are oxides that react with water to form an…

Definition – Gabbro (/ˈɡæbroʊ/) is a phaneritic (coarse-grained), is an intrusive igneous rock that forms from the result of slow cooling of magma inside of…

Margaritasite is a yellow, cesium-bearing mineral in the carnotite group. Its chemical formula is (Cs, K, H3O)2(UO2)2V2O8·H2O and its crystal system is monoclinic. It was…

Christ the Redeemer (Portuguese: Cristo Redentor, standard Brazilian Portuguese: (ˈkɾistu ʁedẽˈtoʁ), local pronunciation: ˈkɾiɕtŭ̻ xe̞dẽ̞ˈtoɦ), is a statue of Jesus Christ in Rio de Janeiro,…

The Alhambra (/ælˈhæmbrə/, Spanish: (aˈlambɾa); Arabic: الْحَمْرَاء‎, romanized: Al-Ḥamrāʾ, pronounced (alħamˈraːʔ), lit. “The Red One”), is a palace and fortress complex of the Moorish monarchs of…

Definition – Hornfels is a fine-grained metamorphic rock that was formed by the contact between mudstone/shale, or other clay-rich rock, and a hot igneous body,…

The Acropolis of Athens is one of the most famous ancient archaeological sites in the world. It is an ancient citadel located on a rocky…