SS2 Accounting – Disposal of Fixed Assets
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SS2 Chemistry – Nitrogen and Its Compounds
NITROGEN AND ITS COMPOUNDS Nitrogen forms about 78% by volume of the atmosphere. It can be found in combined form in trioxonitrate (V) of sodium and calcium. It can also
SS2 Chemistry – The Periodic Trend
CONTENT • The Periodic Properties of Elements: Atomic size, Ionic size, Ionization Energy, Electron Affinity, Electronegativity down the group and across the period. • Diagonal Relationship in the Properties of
