Question Video: Selecting the Periodic Table Entry That Represents a Metal | Nagwa Question Video: Selecting the Periodic Table Entry That Represents a Metal | Nagwa

Question Video: Selecting the Periodic Table Entry That Represents a Metal Science • Second Year of Preparatory School

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In the shown periodic table, which color represents a metal?

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Video Transcript

In the shown periodic table, which color represents a metal?

Elements can be described by their metallic character, which indicates the tendency of atoms in an element to lose electrons. Metals tend to have a strong metallic character. They lose electrons easily to form positive ions. On the other hand, nonmetals have weak metallic character. They do not lose electrons easily and tend to form negatively charged ions.

Metallic character tends to increase on the periodic table as we move down a column. This is because the size of the atom increases as we go down the periodic table. Since the outer electrons are further from the nucleus if the atom is larger, they are not as attracted to the nucleus. If the outer electrons are not as attracted to the nucleus, it is easier for them to be removed.

Metallic character also increases right to left across a row in the periodic table. This is because the outer electrons in atoms of elements on the right-hand side of the periodic table are more strongly attracted to the nucleus. The more attracted the outer electrons are to the nucleus, the harder the electrons are to remove. Previously, we stated that metals tend to have strong metallic character. This means that metals tend to lose electrons easily.

Looking at the trends we discussed, we’d expect the metal to be on the left-hand side of the periodic table. The only colored square on the left-hand side is the blue square. So, the color that represents a metal is blue.

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