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Chemistry definition
SPM chemistry definition
Question | Answer |
---|---|
Ionic Bond | Is formed when atoms are joined together by transferring electrons between metal and non-metal elements. |
Covalent Bond | Is formed when atoms are joined together by sharing of electrons between non-metals elements. |
Octet and Duplet | Stable electron arrangement with eight of two where elements do not donate, receive or share electrons with other elements. |
Chemically inert/nonreactive | An atom achieved stable octet/duplet electron arrangement that do not donate, receive or share electrons with other elements. |
Proton number | Number of protons in a nucleus of an atom. |
Nucleon number | Number of protons and neutron of an atom. |
Melting point | Temperature where a substance changes from solids to liquid or vice versa. |
Boiling point | Temperature where a substance changes from liquid to gas or vice versa. |
Isotopes | An atom of an element that has same number of protons but different number of neutrons/nucleon. |
Empirical formula | Empirical formula shows the simplest ratio of atoms of different elements present in the chemical compound. |
Molecular formula | Molecular formula is the chemical formula that shows the actual number of atoms of different elements present in a compound. |
Chemical formula | Representation of a chemical reaction using chemical formula for the substances. |
Cation | Positively charged ion. |
Anion | Negatively-charged ion. |
Relative atomic mass | Of an element is the average mass of one atom of the element when compare with 1/12 mass of carbon-12. |
Relative molecular mass | Of a molecule is the average mass of a molecule when compared with 1/12 mass of carbon-12. |
Relative formula mass | Of a compound is the average mass of compound when compared with 1/12 mass of carbon-12. |
Molar mass | Mass of one mole of substance. |