Chemistry for Kids: Elements

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Science >> Chemistry for Kids >> Periodic Table

Elements for Kids

Metalloids

The metalloids are a group of elements in the periodic table. They are located to the right of the post-transition metals and to the left of the non-metals. Metalloids have some properties in common with metals and some in common with non-metals.



What elements are metalloids?



The elements that are generally considered metalloids include boron , silicon , germanium , arsenic , antimony, and tellurium. Other elements such as selenium and polonium are sometimes included as well.



What are the similar properties of metalloids?



Metalloids share many similar properties including:

  • They appear to be metal in appearance, but are brittle.
  • They can generally form alloys with metals.
  • Some metalloids such as silicon and germanium become electrical conductors under special conditions. These are called semiconductors.
  • They are solids under standard conditions.
  • They are mostly nonmetallic in their chemical behavior.

Order of Abundance



The most abundant of the metalloids on Earth is silicon which is the second most abundant element in the Earth’s crust after oxygen. The least abundant is tellurium which is one of the rarest stable elements on Earth with an abundance similar to platinum. Here is a list of metalloids in order of abundance in the Earth’s crust:

  1. Silicon
  2. Boron
  3. Germanium
  4. Arsenic
  5. Antimony
  6. Tellurium

Interesting Facts about Metalloids

  • Unlike other families of elements such as the noble gases, alkali metals, and halogens, the metalloids form a diagonal line on the periodic table rather than a vertical line.
  • Silicon is one of the most important materials used to make electronics such as computers and mobile phones.
  • Arsenic is known to be one of the most poisonous of the elements.
  • Antimony and tellurium are primarily used in metal alloys.
  • Tellurium gets its name from the Latin word “tellus” which means “earth.”
  • Antimony has been known about since ancient times and was used as a cosmetic by the Ancient Egyptians .
  • Antimony gets its name from the Greek words “anti monos” meaning “not alone.”




More on the Elements and the Periodic Table



Elements

Periodic Table


Alkali Metals

Lithium

Sodium

Potassium



Alkaline Earth Metals

Beryllium

Magnesium

Calcium

Radium



Transition Metals

Scandium

Titanium

Vanadium

Chromium

Manganese

Iron

Cobalt

Nickel

Copper

Zinc

Silver

Platinum

Gold

Mercury

Post-transition Metals

Aluminum

Gallium

Tin

Lead



Metalloids

Boron

Silicon

Germanium

Arsenic



Nonmetals

Hydrogen

Carbon

Nitrogen

Oxygen

Phosphorus

Sulfur

Halogens

Fluorine

Chlorine

Iodine



Noble Gases

Helium

Neon

Argon



Lanthanides and Actinides

Uranium

Plutonium



More Chemistry Subjects


Matter

Atom

Molecules

Isotopes

Solids, Liquids, Gases

Melting and Boiling

Chemical Bonding

Chemical Reactions

Radioactivity and Radiation
Mixtures and Compounds

Naming Compounds

Mixtures

Separating Mixtures

Solutions

Acids and Bases

Crystals

Metals

Salts and Soaps

Water
Other

Glossary and Terms

Chemistry Lab Equipment

Organic Chemistry

Famous Chemists



Science >> Chemistry for Kids >> Periodic Table