Mass spectrum
A mass spectrum will usually be presented as a vertical bar graph, in which each bar represents an ion having a specific mass-to-charge ratio (m/z) and the length of the bar indicates the relative abundance of the ion.
Relative atomic mass
SHELLS, SUBSHELLS,ORBITALS.
Shapes of orbitals
QUESTIONS
1.How many electrons can be kept in a. 2s sub-shell b. 3d sub-shell
2.Why did Rutherford only take gold foil to bombard alpha rays?
3.Draw a sketch diagram showing the relative energies of the 1s,2s,2p,3s,3p,4s and 4p sub-shells.
SUCCESSIVE IONIZATION ENERGY
The first ionisation energy is the energy required to remove one electron from each atom in one mole of gaseous atoms.
The successive ionisation energy is the measure of the energy required to remove each electron in turn.
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2.Write the electronic configuration of the element X.
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