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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:

Atomic structure

• 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.

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