Another way to write isotopes is to write the name of the element then add the mass number after a dash, for example, "C is carbon-14. Why isn't the atomic number needed for this notation?

hey there!

so, when you eat, your teeth chew and grind food into smaller pieces. this is mechanical digestion. then reactions aided by digestive enzymes break down large food molecules into smaller molecules. this is chemical digestion. the two processes change the food into simpler substances that can be used by the body for raw materials and energy.

hope this

tobey

a. decomposes use carbon from dead organisms as fuel for cellular respiration, returning carbon dioxide back into the atmosphere.

not always but somethings can be reproduced in a laboratory.