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TRANSITION ELEMENTS.............

Copper

Location on the Periodic Table

The transition elements are located in groups 3 to 12 of the periodic table.

Properties

Because they possess the properties of metals, the transition elements are also known as the transition metals. The transition elements have low ionization energies. They exhibit a wide range of oxidation states or positively charged forms. The positive oxidation states allow transition elements to form many different ionic and partially ionic compounds. Thus, the complexes form characteristic colored solutions and compounds. Complexation reactions sometimes enhance the relatively low solubility of some compounds.

Summary of Common Properties

• Low ionization energies
• Positive oxidation states
• Very hard
• High melting points
• High boiling points
• High electrical conductivity
• Malleable
• Five d orbitals become more filled, from left to right on periodic table

METALLOIDS........

Tellurium

Location on the Periodic Table

The metalloids or semimetals are located along the line between the metals and nonmetals in the periodic table. The metalloids are boron, silicon, germanium, arsenic, antimony, and tellurium. Polonium is often considered a metalloid, too.

Properties

The electronegativities and ionization energies of the metalloids are between those of the metals and nonmetals, so the metalloids exhibit characteristics of both classes. Silicon, for example, possesses a metallic luster, yet it is an inefficient conductor and is brittle. The reactivity of the metalloids depends on the element with which they are reacting. For example, boron acts as a nonmetal when reacting with sodium yet as a metal when reacting with fluorine. The boiling points, melting points, and densities of the metalloids vary widely. The intermediate conductivity of metalloids means they tend to make good semiconductors.

Summary of Common Properties

• Electronegativities between those of metals and nonmetals
• Ionization energies between those of metals and nonmetals
• Possess some characteristics of metals/some of nonmetals
• Reactivity depends on properties of other elements in reaction
• Often make good semiconductors

BLUE COLOUR..........

This is COPPER (II) SULPHATE SOLUTION.

It"s BLUE SOLUTION. Please.........remind my colour...

I'm use as ELECTROLYTE in electrolysis process.

I can mantain my colour or bleach to colourless

depend on type of electrode used.