Chemistry-atoms and the periodic table 0.0 / 5 ? ChemistryAtomsGCSEWJEC Created by: Sophie ConwayCreated on: 08-02-14 12:48 what is the relative atomic mass? Ar. the mass of an element,measured on a scale that compares masses of atoms with carbon-12. used to express mass of an atom. 1 of 12 what is the symbol for relative molecular mass? Mr 2 of 12 what is the name for the energy levels around the nucleus? shells or orbits. first shell contains up to 2 electrons, shells 2 and 3, 8 electrons 3 of 12 how can we work out the number of electrons in a shell? by seeing its proton/atomic number, as that will tell us the number of electrons, which is the same as the proton number. 4 of 12 what is electron configuration? an alternative term for electronic structure 5 of 12 what does the group number tell us about the element? gives us the number of electrons in the outer shell 6 of 12 what does the period tell us about the element? indicates how many shells of electrons the atom has 7 of 12 what is an atom? the simple particles-makes up all other molecules 8 of 12 how many different types of particles make up an atom? 3 9 of 12 where is most of the mass of an atom concentrated the nucleus bc very tiny nucleus and big big and small electrons to move around 10 of 12 what is a double covalent bond? each atom contributes two electrons each 11 of 12 finished:)x x 12 of 12
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