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  2. Malaysian Higher School Certificate - Wikipedia

    en.wikipedia.org/wiki/Malaysian_Higher_School...

    STPM is one of the major pre-university systems for admissions to Malaysian public universities, besides the Malaysian Matriculation Programme and the Malaysian Higher Islamic Religious Certificate (STAM). STPM is internationally recognised by many universities, and the results are considered as equivalent to GCE Advanced Level results. STPM is ...

  3. Sijil Pelajaran Malaysia - Wikipedia

    en.wikipedia.org/wiki/Sijil_Pelajaran_Malaysia

    The Sijil Pelajaran Malaysia (SPM), or the Malaysian Certificate of Education, is a national examination sat for by all Form 5 secondary school students in Malaysia.It is the equivalent of the General Certificate of Secondary Education (GCSE) of England, Wales and Northern Ireland; the Nationals 4/5 of Scotland; and the GCE Ordinary Level (O Level) of the Commonwealth of Nations.

  4. List of unsolved problems in chemistry - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    Enzyme kinetics: Why do some enzymes exhibit faster-than-diffusion kinetics? [13]Protein folding problem: Is it possible to predict the secondary, tertiary and quaternary structure of a polypeptide sequence based solely on the sequence and environmental information?

  5. Chemistry - Wikipedia

    en.wikipedia.org/wiki/Chemistry

    Chemistry is the scientific study of the properties and behavior of matter. [1] It is a physical science within the natural sciences that studies the chemical elements that make up matter and compounds made of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during reactions with other substances.

  6. Aqueous solution - Wikipedia

    en.wikipedia.org/wiki/Aqueous_solution

    An aqueous solution is a solution in which the solvent is water. It is mostly shown in chemical equations by appending (aq) to the relevant chemical formula . For example, a solution of table salt , also known as sodium chloride (NaCl), in water would be represented as Na + (aq) + Cl − (aq) .

  7. Chemical element - Wikipedia

    en.wikipedia.org/wiki/Chemical_element

    The discovery and synthesis of further new elements is an ongoing area of scientific study. Description The lightest elements are hydrogen and helium , both created by Big Bang nucleosynthesis in the first 20 minutes of the universe [ 3 ] in a ratio of around 3:1 by mass (or 12:1 by number of atoms), [ 4 ] [ 5 ] along with tiny traces of the ...

  8. Nomenclature of Organic Chemistry - Wikipedia

    en.wikipedia.org/wiki/Nomenclature_of_Organic...

    A full edition was published in 1979, [1] an abridged and updated version of which was published in 1993 as A Guide to IUPAC Nomenclature of Organic Compounds. [2] Both of these are now out-of-print in their paper versions, but are available free of charge in electronic versions.

  9. Atmospheric chemistry - Wikipedia

    en.wikipedia.org/wiki/Atmospheric_chemistry

    Atmospheric chemistry is a branch of atmospheric science that studies the chemistry of the Earth's atmosphere and that of other planets. This multidisciplinary approach of research draws on environmental chemistry, physics, meteorology, computer modeling, oceanography, geology and volcanology, climatology and other disciplines to understand both natural and human-induced changes in atmospheric ...