Metals and Non- Metals
1. dividing elements according to state of matters is not very useful
- better to divide it into metals and non- metals
a) cover most of the elements
- Each kind of element has it's own special properties
a) There are exceptions when you check the properties of the elements
i)non- metal graphite
$ one form of carbon, conducts both heat and eletricity
The Periodic Table
1. displays the symbols of elements in a special order
2. Developed in the 19th century
3. Show symbols in different ways
- alphabetical
- colour and some other properties
4. Much more useful
5. Every elements has it's own number, called the atomic number
- in order
a) interesting patterns in the table
- Metals are all one side and non- metals are on the opposite side
- Gases are all together
- vertical columns called groups
a) elements in same groups have very similar chemical properties
Liquids and Metalloids
1. Room Temperature
- only 2 liquid elements
a) Metal Mercury
b) non- metal bromine
2. Other elements melt to liquids if heat enough
3. Semi conductor elements are all found in the table
- Si
- Ge
- Ga
- As
1. dividing elements according to state of matters is not very useful
- better to divide it into metals and non- metals
a) cover most of the elements
- Each kind of element has it's own special properties
a) There are exceptions when you check the properties of the elements
i)non- metal graphite
$ one form of carbon, conducts both heat and eletricity
The Periodic Table
1. displays the symbols of elements in a special order
2. Developed in the 19th century
3. Show symbols in different ways
- alphabetical
- colour and some other properties
4. Much more useful
5. Every elements has it's own number, called the atomic number
- in order
a) interesting patterns in the table
- Metals are all one side and non- metals are on the opposite side
- Gases are all together
- vertical columns called groups
a) elements in same groups have very similar chemical properties
Liquids and Metalloids
1. Room Temperature
- only 2 liquid elements
a) Metal Mercury
b) non- metal bromine
2. Other elements melt to liquids if heat enough
3. Semi conductor elements are all found in the table
- Si
- Ge
- Ga
- As
This is the table of the properties of metals and non- metals.
This is the periodic table!!!