What does the difference between 256 and 101 in 256/101 Md represent? the atomic number
the nuclide number
the mass number
the number of neutrons

The atomic number

Explanation:

the major pests we deal with are insects, weeds and fungal diseases. a pesticide is a product, whether organic or chemical, used to kill the target pest. there are other techniques gardeners should use that can prevent the severe infestations that make the use of pesticides necessary