All the isotopes of plutonium has 94 protons and 94 electrons. For the number of neutrons of a specified isotope: number of neutrons = rounded atomic mass of the isotope-atomic number (or protons number).
Canada thistle can be killed with either Roundup or 2,4-D weed killers. These weed killers will kill back the leaves on the plant and will kill back some of the root system. The best time to apply these weed killers is on sunny days when the temperatures are between 65 and 85 degrees F. (18-29 C.).hese weed killers will kill back the leaves on the plant and will kill back some of the root system. The best time to apply these weed killers is on sunny days when the temperatures are between 65 and 85 degrees F. (18-29 C.).
How to Kill Grass Using Vinegar Kill unwanted grass with vinegar. White or pickled vinegar is another great way to kill your grass without the use of harmful chemicals. It is safe and will not harm the environment. However, do not spray near any plants you wish to keep, as vinegar will kill them too.s with newspaper, it is often helpful to mow the grassy area first or you may want to till it and then rake the area smooth. Cover the grass with black plastic. Unlike clear plastic, black plastic blocks out light, smothering grass roots and preventing new growth. Secure the plastic with large rocks.