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link to the Group 1 The Alkali Metals     back to Periodic Table Links

Metals, Nonmetals and Metalloids

The Periodic Table of Elements can be divided in 3 groups; Metals, nonmetals and metalloids (semimetals).

The metals make up most of the Periodic Table. They are located on the left side (excluding Hydrogen).

There is one room temperature liquid metal; mercury.

 

 

Properties of Metals

 luster (they are shiny)

malleability (they can be hammered into sheets)

they are ductile (can be made into wire)

they generally have high melting points (except mercury, it is a liquid at room temperature)

they conduct electricity (copper wiring)

they form cations (positive ions)

low electronegativity and ionization energy

they form ionic compounds when bonded to nonmetals (salt NaCl)

they form alloys with other metals (brass-Cu & Zn, bronze Cu & Sn, steel, etc.)

 

The nonmetals are located on the right side of the periodic table (including hydrogen). Some chemist consider the Noble Gases to be nonmetals other do not. I will leave that up to you to decide.

Properties of nonmetals-

they are either soft solids, liquids or gases at room temperature

they brittle (break apart easy)

they lack luster (dull)

form negative ions (anions)

have a high electronegativity and ionization energy

 

Finally the metalloids, which have properties of both nonmetals and metals. They somewhat conduct electricity. They have neither high nor low melting points. Luster but not really. I think you get the picture. These are found on the staircase of your Periodic Table (exclude Aluminum, it is a metal).

Tends in Periodic Properties

 

As you move from left to right the elements become more nonmetallic in character.

As you move down a group the elements become more metallic in character.

Look at group 15

link to the Group 1 The Alkali Metals     back to Periodic Table Links

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