chemistry
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| atom | the basic unit of a chemical element.
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| proton | a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign.
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| neutron | a subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen.
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| electron | a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.
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| atomic mass | the mass of an atom of a chemical element expressed in atomic mass units
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| chemistry | the branch of science that deals with the identification of the substances of which matter is composed; the investigation of their properties and the ways in which they interact, combine, and change; and the use of these processes to form new substances.
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| family | a group consisting of parents and children living together in a household.
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| energy level | the fixed amount of energy that a system described by quantum mechanics, such as a molecule, atom, electron, or nucleus, can have.
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| leptrons | a subatomic particle, such as an electron, muon, or neutrino, that does not take part in the strong interaction.
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| metal | a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivity (e.g., iron, gold, silver, copper, and aluminum, and alloys such as brass and steel).
"vessels made of ceramics or metal"
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| metalled | make out of or coat with metal.
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| nonmetal | an element or substance that is not a metal.
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| quark | any of a number of subatomic particles carrying a fractional electric charge, postulated as building blocks of the hadrons. Quarks have not been directly observed, but theoretical predictions based on their existence have been confirmed experimentally.
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| period | a length or span of time. Full stop or period, a punctuation mark.
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| nucules | the central and most important part of an object, movement, or group, forming the basis for its activity and growth
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| periodic table | a table of the chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure (and hence similar chemical properties) appear in vertical columns.
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| valence | e combining power of an element, especially as measured by the number of hydrogen atoms it can displace or combine with.
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| chemical symbol | an abbreviation or short representation of a chemical element; the symbols in the periodic table. Natural elements all have chemical symbols of one or two letters; some manmade elements have three-letter symbols.
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| compound | a thing that is composed of two or more separate elements; a mixture.
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| mixsture | a substance made by mixing other substances together.
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| matter | physical substance in general, as distinct from mind and spirit; (in physics) that which occupies space and possesses rest mass, especially as distinct from energy.
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| ionic bonds | is a type of chemical bond that involves the electrostatic attraction between oppositely charged ions, and is the primary interaction occurring in ionic compounds.
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| ion | An ion is an atom or a molecule in which the total number of electrons is not equal to the total number of protons, giving the atom or molecule a net positive or negative electrical charge.
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| covalent bond | A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms. These electron pairs are known as shared pairs or bonding pairs, and the stable balance of attractive and repulsive forces between atoms,
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