Draw dot and cross diagrams for small covalent molecules
The substances share electrons
only the outer shell of electrons are shown in the dot and cross diagrams
By sharing the complete each others outer shell
For example H2 with put both of its singular electrons to share so then they both have two electrons on their outer shell therefore filling it.
Small molecules usually contain from 2-5 atoms.
Carbon Dioxide (CO2)
Deduce molecular formulae from models and diagrams
The empirical formula is the simplest whole number ratio of all the atoms in a molecule
E.g the molecular formula for glucose is C6H12O6
Depending on the amount of atoms of each element changes the number after the chemical symbol
Identify single covalent bonds in molecules and structure.
Covalent bonds occur between two or more non metals
they share electrons
these hold the atoms together
they have no free electrons or ions so they don't conduct electricity
they are usually liquids or gases
they have low melting points
this bond is illustrated by a single line