Chemical fundamentals Revision for end of unit 1 topic 1 0.0 / 5 ? ChemistryProperties and structure of atomsOtherOther Created by: MrsBCreated on: 29-08-22 11:27 What subatomic particles make up an atom? Protons, neutrons & electrons 1 of 20 Define element An element is made up of atoms of the same type which all have the same number of protons in the nucleus 2 of 20 Define proton A positively charged subatomic particle - makes a contribution to atomic mass 3 of 20 Percentage abundance the percentage of each isotope contained within a sample of element; it must always add up to 100% 4 of 20 Isotope atoms of an element that have the same number of protons but different numbers of neutrons 5 of 20 Define electron Negatively charged subatomic particle - makes no contribution to atomic mass 6 of 20 Define neutron subatomic particle with no charge - makes a contribution to atomic mass 7 of 20 Electrostatic forces an attraction between objects of opposing charges 8 of 20 Mass number the total number of subatomic particles in the nucleus 9 of 20 Ion an atom containing an electric charge 10 of 20 Density how closely packed particles (atoms or molecules) are in a substance. 11 of 20 boiling point the temperature at which a liquid becomes a gas 12 of 20 melting point the temperature at which a solid becomes a liquid 13 of 20 electron configuration shows where the electrons are located within an atom 14 of 20 Name the possible sublevels in an electron configuration s, p, d, f 15 of 20 Valence electrons The outer electrons of an atom. An element's properties are determined by the number of valence electrons. 16 of 20 Polyatomic ion contains two or more atoms (of the same or different elements) with an overall charge 17 of 20 Ionic bonding the process by which atoms transfer valence electrons to each other 18 of 20 covalent bonding a sharing of electrons between atoms. 19 of 20 relative atomic mass (RAM) the mass of an atom once the mass and percentage abundance of all isotopes have been considered relative to carbon-12 isotope 20 of 20
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