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In coordination chemistry, a coordinate covalent bond, [1] also known as a dative bond, [2] dipolar bond, [1] or coordinate bond [3] is a kind of two-center, two-electron covalent bond in which the two electrons derive from the same atom. The bonding of metal ions to ligands involves this kind of interaction. [4]
The Sri Lankan Ordinary Level (O-level) formerly called Senior School Certificate (SSC), is a General Certificate of Education (GCE) qualification in Sri Lanka, conducted by the Department of Examinations of the Ministry of Education. It is based on the Cambridge University Ordinary Level qualification.
Formal charges in ozone and the nitrate anion. In chemistry, a formal charge (F.C. or q*), in the covalent view of chemical bonding, is the hypothetical charge assigned to an atom in a molecule, assuming that electrons in all chemical bonds are shared equally between atoms, regardless of relative electronegativity.
The Sri Lankan Advanced Level (A-level), formerly known as the Higher School Certificate (HSC), is a General Certificate of Education (GCE) qualification exam in Sri Lanka, similar to the British Advanced Level. It is conducted annually by the Department of Examinations under the Ministry of Education.
The preliminary round of the Sri Lankan Astronomy and Astrophysics Olympiad competition is a two-hour theory paper on Astronomy and Astrophysics. [2] It usually consists of 20-30 multiple choice questions and five structured essay type questions. The competition is conducted in three languages Sinhala, Tamil and English.
Education in Sri Lanka has a long history that dates back two millennia. While the Constitution of Sri Lanka does not provide free education as a fundamental right, the constitution mentions that 'the complete eradication of illiteracy and the assurance to all persons of the right to universal and equal access to education at all levels" in its section on directive principles of state policy ...
Name Notability Reference Mahinda Rajapaksa: President of Sri Lanka (2005-2015), Prime Minister of Sri Lanka (2004-2005, 2018, 2019-2022) : Nimal Siripala de Silva: Member of Parliament - Badulla (1994–present), Leader of the Opposition (Sri Lanka) (2015), Leader of the House (2005-2015), Cabinet Minister of Justice, Human Rights and Legal Reforms (2015-2020), Cabinet Minister of Labour ...
A referendum on extending the term of parliament by six years was held in Sri Lanka on 22 December 1982. It was the first and so far only national referendum to be held in the country. [ 3 ] The referendum was called for by President J. R. Jayawardene , who had been elected to a fresh six-year term as President in October 1982.