Chemistry Notes {Periodic Table}

Periodic Table
Elements are arranged in the order of increasing proton number .

Groups


Period {vertical}
All the elements in the same period use the same number of electron shells

Group - {horizontal}
The elements in a group have similar chemical properties due to the same number of valance electrons in the valence shell

Physical Properties of Metals
- High melting and boiling points
- Good conductor of electricity and heat
- Malleable and ductile
- Silvery appearance

Pysical Properties of Non-Metals
- Low melting and boiling points
- Good insulator of electricity and heat
- Brittle in solid state
- Variety of colours

Chemical Properties of Metals
- Form basic oxide generally which reacts with acids to form salt and water
- Form positive ions by losing electrons
- Form ionic compounds when combines with non-metallic elements

Chemical Properties of Non-Metals
- Form acidic oxide generally which reacts with alkalis to form salt and water
- Form negative ions by gaining electrons
- Form covalent compounds by sharing electrons with non-metallic elements

Group 1 {Alkali Metals}