These ‘chapter’ posts are not complete summaries or sets of notes. They are simply collections of supplementary resources that I recommend using in the classroom in addition to the textbook and any other assignments on the course. Most of the resources here are videos, but I will also occasionally put worksheets, quizzes, books, apps and games here as well.
4.1: Masses of particles
Watch the following introductory videos on relative atomic mass.
You no longer need to know the workings of a mass spectrometer because it’s been deleted from the VCE Chemistry study design. However, many schools still use older worksheets, which ask you to label the function of each part of the machine. Ask your teacher whether the mass spectrometer machine will be examined in your school’s Year 11 examination.
We have several ‘number-words’ in English. Examples include ‘pair’, which means ‘2’; ‘dozen’, which means ’12’, and ‘ream’, which means ‘500’. A mole is a very large number-word with a value of 6.02×1023.
The mole is also called ‘Avogadro’s number’.
Most important formula here is n = N ÷ NA
n is the number of moles in your sample;
N is the number of particles (either molecules or atoms);