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  2. Chlorine - Wikipedia

    en.wikipedia.org/wiki/Chlorine

    Chlorine is a chemical element; it has symbol Cl and atomic number 17. The second-lightest of the halogens, it appears between fluorine and bromine in the periodic table and its properties are mostly intermediate between them. Chlorine is a yellow-green gas at room temperature.

  3. Chemical symbol - Wikipedia

    en.wikipedia.org/wiki/Chemical_symbol

    The periodic table, elements being denoted by their symbols. ... The symbol Cl is now used for chlorine. [nb 1] Cm: Catium: 87: Proposed name for francium.

  4. List of chemical elements - Wikipedia

    en.wikipedia.org/wiki/List_of_chemical_elements

    Like the periodic table, the list below organizes the elements by the number of protons in their atoms; it can also be organized by other properties, such as atomic weight, density, and electronegativity. For more detailed information about the origins of element names, see List of chemical element name etymologies.

  5. If You Make Fewer Than 3 Mistakes, It Means You Were ... - AOL

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    Get ready to test yourself on the symbols of chemical elements from the periodic table in 25 questions!Let’s be If You Make Fewer Than 3 Mistakes, It Means You Were Really Good At Chemistry Back ...

  6. List of chemical element name etymologies - Wikipedia

    en.wikipedia.org/wiki/List_of_chemical_element...

    41 of the 118 known elements have names associated with, or specifically named for, places around the world or among astronomical objects. 32 of these have names tied to the places on Earth, and the other nine are named after to Solar System objects: helium for the Sun; tellurium for the Earth; selenium for the Moon; mercury (indirectly), uranium, neptunium and plutonium after their respective ...

  7. 108 “Are You Smarter Than A 5th Grader?” Questions For Your ...

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    What is the chemical symbol for water in the periodic table? Answer: H2O. What is the most abundant element in the universe? Answer: Hydrogen. Which planet is known as Earth’s twin?

  8. Halogen - Wikipedia

    en.wikipedia.org/wiki/Halogen

    The halogens (/ ˈ h æ l ə dʒ ə n, ˈ h eɪ-,-l oʊ-,-ˌ dʒ ɛ n / [1] [2] [3]) are a group in the periodic table consisting of six chemically related elements: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and the radioactive elements astatine (At) and tennessine (Ts), though some authors [4] would exclude tennessine as its chemistry is unknown and is theoretically expected to ...

  9. Naming of chemical elements - Wikipedia

    en.wikipedia.org/wiki/Naming_of_chemical_elements

    All 118 discovered elements are confirmed and have a formal name and symbol, as decided by IUPAC. The last four names and symbols were added on November 28, 2016. [1] [2] Currently there are no unconfirmed discoveries and all seven periods (rows) of the periodic table are completed.

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