How are a symbol and model both examples of representation ?

In saturated organic compounds, all the bonds between carbon atoms are called?

Draw the structure for 5-isopropyl-2-methyl-3-nonene

Scientists often have to deal with numbers that are either very large or very small. for example, the radius of the sun is approximately 696,000 kilometers, while bacterial cells are as small as 1.9 × 10-4 millimeters. express each number in an alternate form.