This PowerPoint relates to the Atomic Structure of the Chemistry 2 specification. Students learn:

a) know that the relative masses of protons, neutrons and electrons and their relative electric charges are as shown:

mass charge

proton 1 +1

neutron 1 0

electron negligible -1

(b) understand that the atom as a whole has no electrical charge because the number of electrons in the orbits (shells) is equal to the number of protons in the nucleus.

(c) know that all atoms of a particular element have the same number of protons and atoms of different elements have different numbers of protons.

(d) understand the terms atomic number and mass number.

(e) use data given in the form 11 23 Na to give the number of protons, neutrons and electrons

present in the atom.