Which elements form ions that are usually colored in solid compounds and in solution? A. alkali metals B. alkaline earth metals C. transition elements D. halogen elements

The elements that have been colored in the solid and solution have been transition elements.Thus, option C is correct.

The periodic table has been consisted of metals, non-metals, and metalloids. The presence of valence electrons of the elements has been responsible for the chemical properties of the elements.

The transition elements have been the metals that have been consisted of electrons in the d orbitals. The presence of electrons results in the atom to excited to higher energy and have radiations in the visible region.

Thus, the aqueous and solid transition elements have been colored. Thus, option C is correct.

For more information about the colored compounds, refer to the link:

link

C. transition elements

Explanation:

Transition elements are groups of metallic elements that have partially filled d orbitals. They occupy the d-block of the periodic table (Group 3-12). Examples of elements that fall under this category are Nickel (Ni), Cobalt (Co), Copper (Cu), Zinc (Zn) etc. Transition metals have outstanding properties that distinguishes them from other elements.

One of these properties is their ability to form colored compounds due to their unfilled d electron shells. They form ions that are usually colored in solid compounds and in solution.

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