Question

what do you mean by f number how can we balance the order of elements​

Answer 1

Answer:

Now, let's consider a similar reaction between hydrogen and nitrogen. Typically, it is easiest to balance all pure elements last, especially hydrogen. First, by placing a two in front of ammonia, the nitrogens are balanced. This leaves 6 moles of atomic hydrogen in the products and only two moles in the reactants.If you wish, it's usually possible to set a camera to adjust in half or full stops via the custom menu. The full stop aperture settings that you are most like to encounter are: f/1.4, f/2, f/2.8, f/4, f/5.6, f/8, f/11, f/16, f/22 and f/32. Other settings such as f/3.5 and f/6.3 are fractions between these whole stops.