The first example of diffusion is smoking a cigarette when u light it it spreads through the air.
The second example is lighting a candle in a room it the smoke spreads through the air.
Smoke can be very bad for the air and the people around because it can cause many problems with your breathing.
Its 100% B. my dude because the atomic theory doesn't state anything else
<span>element have one or two additional neutrons than proton, making it unstable.</span>
