Chromium By: Ariana James Chemistry. Who discovered Chromium? When was it discovered? Louis-Nicholas Vauquelin discovered Chromium during 1797 in France.

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Presentation transcript:

Chromium By: Ariana James Chemistry

Who discovered Chromium? When was it discovered? Louis-Nicholas Vauquelin discovered Chromium during 1797 in France.

Atomic Symbol? Name? Number? Symbol: Cr Name: Chromium Number: 24

Atomic Mass? Protons, Electrons and Neutrons? Mass: g/mol. 24 protons 24 electrons 28 neutrons

Is It a Metal, Metalloid, or non metal? Solid, Liquid, or Gas? Chromium is a solid, metal.

What group is it in? Why? What period? Chromium is in group 6. Chromium is a transition element; it’s cations have an incomplete d-subshell. It is located in period 4.

What types of isotopes are in Chromium? Electron Configuration ? 50Cr 52Cr 53Cr 54Cr 3d 5 4s % % 9.501% 2.365%

Definition of Ionization energy and units: Ionization Energy: The measure of the energy required to remove one electron from one molecule in the gaseous state. Units: KJ/mol. -1

What ion is your element most likely to form? Can it form more than one ion? If so, what are the other ions? Chromium ions is a transitional metal and it forms octahedral complexes. Atomic Radius: 249.8pm

Define electronegativity. What is the electronegativity of your element? The tendency of an atom or radical to attract electrons in the formation of an ionic bond. Electronegativity of Chromium: 1.66

Interesting Facts Origin name “chroma” meaning colour Chromium is used to give glass an emerald green color. Chromium is also responsible for the color red in rubies. Chromium metal dissolves in dilute hydrolic acid to form solutions containing the aquated Cr(II) ion together with hydrogen gas H 2

Works Cited um/ um/ urses/chromium.htmlhttp://wwwchem.uwimona.edu.jm/co urses/chromium.html