C5.1.2 recall that the relative proportions of KS3 the main gases in the atmosphere are  about 78% nitrogen, 21% oxygen, 1% argon and 0.04% carbon dioxide C5.1.3 use the names and symbols of common elements and compounds and the C1.1.10  principle of conservation of mass to recall the symbols for the atoms and write formulae and balanced chemical molecules of these gases in the air equations C5.1.4 recall that most non-metal elements C3.4.8  and most compounds between describe the arrangement of chemical elements are molecular bonds in simple molecules C5.1.5 understand that molecular elements C3.4.8  and compounds with small molecules describe the arrangement of chemical have low melting and boiling points in simple molecules C5.1.6 interpret quantitative data (for example, C5.1.3  melting and boiling points) and qualitative data about the properties of use melting point data to distinguish molecular elements and compounds pure from impure substances C5.1.7 understand that molecular elements and compounds, such as those in the C3.4.14 air, have low melting and boiling explain how the bulk properties of  points, and are gases at room simple molecules are related to the temperature, because they consist of covalent bonds they contain and their small molecules with weak forces of bond strengths in relation to attraction between the molecules intermolecular forces C5.1.8 describe and compare the nature and understand that pure molecular arrangement of chemical bonds in ionic C4.3.8  compounds do not conduct electricity compounds, simple molecules, giant because their molecules are not covalent structures, polymers and charged metals C5.1.9 understand that bonding within molecules is covalent and arises from C4.3.5  the electrostatic attraction between the describe the nature and arrangement of nuclei of the and the electrons chemical bonds in giant covalent shared between them structures
C5.1.2 recall that the relative proportions of the main gases in the atmosphere are about 78% nitrogen, 21% oxygen, 1% argon and 0.04% carbon dioxide KS3  C5.1.3 recall the symbols for the atoms and molecules of these gases in the air C1.1.10 use the names and symbols of common elements and compounds and the principle of conservation of mass to write formulae and balanced chemical equations  C5.1.4 recall that most non-metal elements and most compounds between elements are molecular C3.4.8 describe the arrangement of chemical bonds in simple molecules  C5.1.5 understand that molecular elements and compounds with small molecules have low melting and boiling points C3.4.8 describe the arrangement of chemical in simple molecules  C5.1.6 interpret quantitative data (for example, melting and boiling points) and qualitative data about the properties of molecular elements and compounds C5.1.3 use melting point data to distinguish pure from impure substances  C5.1.7 understand that molecular elements and compounds, such as those in the air, have low melting and boiling points, and are gases at room temperature, because they consist of small molecules with weak forces of attraction between the molecules C3.4.14 explain how the bulk properties of simple molecules are related to the covalent bonds they contain and their bond strengths in relation to intermolecular forces  C5.1.8 understand that pure molecular compounds do not conduct electricity because their molecules are not charged C4.3.8 describe and compare the nature and arrangement of chemical bonds in ionic compounds, simple molecules, giant covalent structures, polymers and metals  C5.1.9 understand that bonding within molecules is covalent and arises from the electrostatic attraction between the nuclei of the and the electrons shared between them C4.3.5 describe the nature and arrangement of chemical bonds in giant covalent structures 