3794141
Description
Flashcards by Inger Young, updated more than 1 year ago
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Created by Inger Young
over 8 years ago
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| Question | Answer |
| Neutron | a particle found in the nucleus of an atom mass of 1 charge 0 |
| Proton | a particle found in the nucleus of an atom mass of 1 charge +1 |
| Electron | the smallest of the partials that make up the atom, they carry a negative charge. the number of protons and electrons equal mass 1/2000 charge -1 |
| Isotope | atoms of the same element with different numbers of neutrons |
| Relative isotopic mass | the mass of an atom of an isotope compared with 1/12 of the mass of an atom of carbon-12 |
| Relative atomic mass (Ar) | the weighted mean mass of an atom of an element compared with 1/12 of the mass of an atom of carbon-12 |
| Mass spectrometry | an analytical chemistry chemical technique that helps identify the amount and type of chemicals present in a sample by measuring the mass-to-charge ratio and abundance of gas-phase ions |
| Amount of substance | the quantity that has moles as a unit, a way of counting atoms |
| Mole | the amount of any substance containing as many particles as there are atoms in exactly 12g of the carbon-12 isotope |
| Avogadro's number/constant (NA) | the number of atoms per mole of the carbon-12 isotope (6.02x10^23) |
| Molar mass, M | the mass per mole of a substance, units gmol^-1 |
| Empirical formula | shows the smallest whole-number ratio of atoms of the element in a compund |
| Molecular formula | shows the number and the types of atoms in a compound |
| Molar gas volume | volume per mole of gas units are dm^3mol^-1 |
| Standard solution | a solution of known concentration |
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