**C4 ATOMS COMBINING MINDMAP
Ionic Bonding
Metallic Bonding
Ionic Bonding: Bond between metal and non-metal ions with strong electrostatic forces of attraction between oppositely charged ions. Example of an ionic bond: Ionic Bonding in Sodium Chloride ( NaCl )
Properties
Lattice structure of positive metal ion with the sea of delocalised electrons
An atom is the smallest unit of ordinary matter that forms a chemical element.
Deduce the formula for compound
Atoms, compounds, ions, mixture
Ion: atom that has charge
Compound: 2 or more atom that are chemically bonded
Element: made up of the same type of atoms
Between non-metal and non-metal atom by sharing electrons
Covalent Bonding
A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms.
Ionic compound formula: the positive ions and negative ions joined together with opposite charges, overall net charge is zero. Eg: Magnesium ion, Mg2+ and Chloride ion Cl- forming an ionic compound with the formula MgCl2
Criss-cross method: ONLY applicable for ionic compound because it has charges
Predict the charge on the ion using the Group number. Eg: Group I - charge 1+, Group II - charge 2+, etc
These are the macromolecule structure with covalent bonding
Covalent compound formula: the formula is determined using the atoms that joining together through sharing electrons that make the full valency of electrons. Eg: CO2, H2, Cl2, CH4
The formula for polyatomic ions (compounds ions)
Structural Formula
Using the DOT and CROSS to represent the electrons, the bracket is added and the charge is written at the upper top right hand side
Giant Covalent Structure (Macromolecule)
Giant Covalent Structure
Graphite
Diamond
Silicone (iV) dioxide
Force that holds atoms together in metallic substance.The atoms that electrons leave behind becomes positive ions and the interaction between such ions and valence elections gives to the cohesive or binding force that holds metallic crystal together
metal atom loses electron to form metal ion: X - e ---> X1+. [X ---> X1+ + e]