| These
particles are extremely small. One small grain
of salt is made from about a hundred, billion,
billion particles. (100,000,000,000,000,000,000).
The particles are so small that we cannot see
them - even with a microscope. However, it is
useful to imagine that we can.
There is nothing else except the particles.
The particles are not ‘inside’ the
substance, they are the substance. |
