Question

Is chromium shiny or dull?

Answer 1

Hint:Chromium is the element of group 6 and period 4 of the d-block, so it is a transition element and its atomic number is 24. Since it is a transition element then it will be metal and its color is grey.

Complete step-by-step answer:Chromium is the element of the transition elements, and it belongs to group 6 and period 4 of the d-block, so its atomic number is 24. The symbol which represents the chromium is Cr. The 24 electrons as shown in the electronic configuration given below:
$1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{6}}4{{s}^{1}}3{{d}^{5}}$
This is an exceptional configuration because one electron from the 4s jumps to the 3d because of the extra stability of the half-filled d-orbital. Now, since it is on the left side of the periodic table it is a metal, and even if it is a transition element, it will be a hard metal because all the elements in the transition elements and inner transition elements are hard metals.
Its color or appearance is silver-grey, due to its color it has a shiny appearance which is known as a lustrous element.
Its boiling point and melting points are 2944 K and 2180 K respectively. Its density is 7.19 $g/c{{m}^{3}}$. Its heat of fusion and its heat of vaporization is 21.0 KJ /mol and 347 KJ /mol respectively.

Therefore, chromium is a shiny metal.

Note:Stainless steel which a very useful component of kitchen accessories is an alloy in which chromium is also present. Chromium is mainly obtained from the Chromite ore which is found in Africa, India, Afghanistan, etc.