Home > Subjects > Chemistry > Level 1 > 1.4 Selected elements > Subject content
- Subject: Chemistry
- AS: AS90933
- Level: 1
- Credits: 4
- External
Chemistry 1.4 Demonstrate understanding of aspects of selected elements
Subject content
Make sure you have up-to-date course notes and don’t forget to use them. If you haven’t got them, see your teacher. These are the topics you need to revise before doing this assessment:
- Relate the number of protons, neutrons, and electrons in an atom or monatomic ions to the atomic number, mass number, and charge.
- Know names and symbols of first 20 elements plus Cu, Br, Fe, Zn, Pb, and Ag.
- Know the electron arrangement of atoms or monatomic ion of the first 20 elements of the periodic table.
- Relate the charge of monatomic ions to the position of the element in the periodic table (groups 1, 2, 16, and 17 only).
- Know how to use a table of ions. You will be provided with a resource booklet that includes a table of ions.
- Name or write formula of a given salt including salts that require a bracket around a polyatomic ion such as the salts Ca(NO3)2 made up of the polyatomic ion, nitrate, and CaCO3 made up of the polyatomic ion, carbonate.
- Trends in reactivity of elements down a group.
- Trends in the metal or non-metal character of elements across a period (metals on the left, non-metals on the right).
Metals – Li, Na, Ca, Mg, Al, Zn, Fe, Pb, Cu and Ag
- Physical properties – melting and boiling points, electrical conductivity, thermal conductivity, density, ductility, lustre, malleability, hardness, colour.
- Reactions of metals – limited to reactions between metals and oxygen, metals and water, and metals with acids (HCl, H2SO4)
- Uses of metals related to their chemical and physical properties.
- Alloys - properties and uses
Non-metals and selected compounds –including sulfur, aqueous chlorine, allotropes of carbon and oxygen, bromine, nitrogen, sulfuric acid and ammonia
- Physical properties – melting and boiling point, state, colour, solubility in water, hardness, electrical and thermal conductivity, density.
(You can access information about the examinable non-metals from the Periodic table by selecting a non-metal element. You will be provided with a periodic table in your exam, in the resource booklet.
- Reaction of non-metals with oxygen – sulphur, carbon, nitrogen, bromine, chlorine
- Uses of non-metal elements related to their chemical and physical properties including sulfur, aqueous chlorine, allotropes of carbon (diamond and graphite and oxygen (ozone)
- Uses of selected compounds related to their properties including sulfuric acid and ammonia.

