
Demonstrate understanding of processes in the atmosphere system Level 3
Lewis structures also known as Lewis diagrams are diagrams that show the bonding between atoms of a molecule and lone pairs or non bonding electrons. Using these structures it is possible to predict the shapes of covalent molecules.
Working out Lewis structures involves the use of an arcane set of rules the only justification for which is that they appear in chemistry text books and examinations.
There is an app for this. Learn how to construct the diagrams but use the app to check answers. It works by plugging the formula. You don”t need to use subscripts.
For example
methane CH4
sulphuric acid H2SO4
You can also type in the name methane.
what the atomic number and mass number of an element is.
how elements are arranged on the periodic table.
what Periods and Groups are.
the physical and chemical properties of the group 1 metals.
the physical properties of group 17 elements.
the physical properties of group 18 elements
that sodium and chlorine react violently together.
that elements in the same group have similar properties. WHY!
what the atomic number and mass number of an element is.
how elements are arranged on the periodic table.
what Periods and Groups are.
the physical and chemical properties of the group 1 metals.
the physical properties of group 17 elements.
the physical properties of group 18 elements
that sodium and chlorine react violently together.
that elements in the same group have similar properties. WHY!