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Chemistry is the scientific study of the properties and behavior of matter. 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.
Modern Standard Hindi ( Hindi: आधुनिक मानक हिन्दी, romanized : Ādhunik Mānak Hindī ), [14] commonly referred to as Hindi (Hindi: हिन्दी, [a] Hindī ), is an Indo-Aryan language spoken chiefly in North India, and serves as the lingua franca of the Hindi Belt region encompassing parts of northern ...
Alchemy (from Arabic: al-kīmiyā; from Ancient Greek: χυμεία, khumeía) [1] is an ancient branch of natural philosophy, a philosophical and protoscientific tradition that was historically practised in China, India, the Muslim world, and Europe. [2] In its Western form, alchemy is first attested in a number of pseudepigraphical texts ...
Hydrochloric acid, also known as muriatic acid or spirits of salt, is an aqueous solution of hydrogen chloride (HCl). It is a colorless solution with a distinctive pungent smell. It is classified as a strong acid. It is a component of the gastric acid in the digestive systems of most animal species, including humans.
Hindi literature ( Hindi: हिन्दी साहित्य, romanized : hindī sāhitya) includes literature in the various Hindi languages which have different writing systems. Earliest forms of Hindi literature are attested in poetry of Apabhraṃśa like Awadhi, and Marwari languages. Hindi literature is composed in three broad ...
Sodium is an alkali metal, being in group 1 of the periodic table. Its only stable isotope is 23 Na. The free metal does not occur in nature and must be prepared from compounds. Sodium is the sixth most abundant element in the Earth's crust and exists in numerous minerals such as feldspars, sodalite, and halite (NaCl).
René Descartes ( / deɪˈkɑːrt / day-KART or UK: / ˈdeɪkɑːrt / DAY-kart; French: [ʁəne dekaʁt] ⓘ; Latinized: Renatus Cartesius; [note 3] [11] 31 March 1596 – 11 February 1650) [12] [13] [14] : 58 was a French philosopher, scientist, and mathematician, widely considered a seminal figure in the emergence of modern philosophy and ...
Iron is a chemical element; it has symbol Fe (from Latin ferrum 'iron') and atomic number 26. It is a metal that belongs to the first transition series and group 8 of the periodic table. It is, by mass, the most common element on Earth, forming much of Earth's outer and inner core.