Periodic Table of Elements
A chart of the chemical elements that displays them in rows horizontally in order of increasing atomic number and vertically according to similarity of the chemical properties of their atoms. The position of an element on the table thus gives useful information about the structure and chemical properties of the element. It determines whether the element is a metal, non metal or a metalloid.
Legos and Elements
Dmitri Ivanovich Mendeleev 27 January 1834 – 20 January 1907) was a Russian chemist and inventor. He formulated the Periodic Law, used to classify the elements. For his contribution, an element was named after him.
Metals
Building Blocks
Chemical Properties
Physical Properties
Legos are very similar to atoms because they both are the most basic of building blocks.Legos have many colors, shapes and sizes, atoms do too. Each different kind of atom is called an element. Each element is unique. Breaking a lego structure to the smallest pieces is like breaking down an object or substance to its most basic form, the atom. While you put legos together to create a structure, atoms bind with other atoms to create a molecule.
- Corrodes
- Good reducing agent
- Forms basic oxides
- Loses electrons easily
- Ductile
- Magnetic
- Opaque
- Malleable
- Lustrous
- Good conductor of heat
- Solid at room temp
- Sonorous
What is an element?
METALS AND NON METALS
A chemical element is a pure chemical substance consisting of one type of atom distinguished by its atomic number, which is the number of protons in its nucleus. Elements are divided into metals, metalloids, and non-metals
Metals and Non Metals
Physical Properties Exceptions
- Most metals are silvery gray except for gold and copper with their yellow/orange luster
- Alkali metals such as lithium, potassium and sodium are soft that they can be cut by a knife.
- Metals are solid at room temp except for Mercury
- Some non metals like graphite and iodine exhibit metallic luster
- Graphite, an allotrope of Carbon (NM) is also a good conductor of electricity
- Diamond, another allotrope of Carbon is the hardest natural substance known to man. It also exhibits a high melting point.
Non Metals
Chemical Properties
Physical Properties
Metals
Non Metals
Everyday Uses
- Not ductile
- Dull
- Brittle
- Gas or liquid at room temperature
- Transparent
- Poor conductor of heat and electricity
- Not sonorous
- Form acidic oxides
- Good oxidizing agents
- Readily gain or share electrons
- Have higher electronegativities
- Copper for wiring
- Titanium for joint replacement
- Gold and Silver for jewelry
- Aluminum for packaging, cooking utensils
- Calcium for bone strength
- Potassium for health supplements
- Zinc for protective coat for Iron and sunscreen
- Iron for manufacturing automobiles
- Cobalt for magnets
- Nitrogen for explosives
- Krypton for lights
- Neon for bright signs
- Oxygen for breathing
- Bromine for camera film
- Silicon for glasses
- Tellurium for tires
- Sulphur for matches and dyes
- Graphite in pencils and brake linings
- Phosporous for fireworks