ATOMIC STRUCTURE

Objectives

On completion of the unit you should be able to:

1. state the mass, charge and location of protons, electrons and neutrons.
2. given the atomic number of an element, draw diagrams showing the protons in the nucleus and the electrons in shells (or energy levels) around the nucleus.
3. write the electron dot formulae for the elements in groups 1 to 8 in the periodic table.
4. define valence electrons and atomic number.
5. define positive and negative ions.
6. identify the elements in the periodic which tend to form positive ions and those which tend to form negative ions.
7. define isotopes, mass number and atomic mass.
8. given the relative abundance and isotopic masses for an element, calculate the atomic mass of that element.
9. given the atomic number and mass number of an element, calculate the number of electrons.

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