The table in the question shows details of the particles present in an atom of…
Tag: o-level chemistry
Question Acid rain contains sulfuric acid and can cause lakes to become acidic. Acidic lakes…
Question Which row shows the correct structures of the covalent molecules C2H2; hydrazine, N2H4; nitrogen,…
An energy level diagram shows the energy change in a reaction. Enthalpy change, ΔH, represents…
Electrolysis is the process of using electricity to break down or decompose a compound (usually…
Redox Basics A redox reaction is a reaction where both oxidation and reduction processes occur…
What is a base? A base is any metal oxide (contains oxide ions, O2-) or…
What is an acid? An acid is a substance that produces hydrogen ions, H+, when…
Ionic Structure Formed between metallic atoms and non-metallic atoms by transfer of electrons. Metallic atoms…
The mole is the base unit of amount of substance. One mole of substance has…