
Define metallic and non-metallic characters.
Answer
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Hint: metallic character refers to the level of reactivity of a metal. Non-metallic character relates to the tendency to accept electrons during chemical reactions. Metallic tendency increases going down a group. Non-metallic tendency increases going from left to right across the periodic table.
Complete answer:
Metallic characters refer to the tendency of an element or a metal to lose electrons and form positive ions (cations). For example- sodium, potassium, etc.
Non-metallic character refers to the tendency of an element to accept electrons to form negative ions (anions). For example- oxygen, chlorine, etc.
The metallic characters are shown by metals and the non-metallic characters are shown by non-metals. The difference between the metals and non-metals are given in the table below:
Note:
There are certain elements whose properties lie between the metals and non-metals, these are called metalloids. There are only seven metalloids in the entire periodic table. These are boron, silicon, germanium, arsenic, antimony, tellurium, and polonium. They are solid, brittle, and semi-conductive. When mixed with metals they can form alloys.
Complete answer:
Metallic characters refer to the tendency of an element or a metal to lose electrons and form positive ions (cations). For example- sodium, potassium, etc.
Non-metallic character refers to the tendency of an element to accept electrons to form negative ions (anions). For example- oxygen, chlorine, etc.
The metallic characters are shown by metals and the non-metallic characters are shown by non-metals. The difference between the metals and non-metals are given in the table below:
Metals-showing metallic character | Non-metals-chowing non-metallic characters |
They are solids at room temperature. except for mercury and gallium | They are solid as well as gases at room temperature except for bromine. |
Good conductors of electricity and heat | Generally poor conductors of electricity and heat |
Malleable, ductile, and generally hard except sodium and potassium | Neither malleable nor ductile, and generally soft except diamond |
Metals generally have a high melting point and boiling point except for gallium and cesium | Non-metals generally have low melting points and boiling points except diamond and gallium. |
give a shining appearance (lustrous) | no shining appearance except iodine (non-lustrous) |
Metals are electropositive | Non-metals are electronegative |
Note:
There are certain elements whose properties lie between the metals and non-metals, these are called metalloids. There are only seven metalloids in the entire periodic table. These are boron, silicon, germanium, arsenic, antimony, tellurium, and polonium. They are solid, brittle, and semi-conductive. When mixed with metals they can form alloys.
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