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 Onion Weed. There remains two effective ways to kill onion weed however, the use of a glyphosate based weedkiller, such as Roundup, or covering the area under a sheet of black plastic. The first solution is the most effective and straightforward, if a little time consuming.asily detected by the pungent onion-like odour that it gives off, especially after mowing, it is a cosmopolitan weed the bane of gardenersâ lives all over the world. One of the most difficult weeds to eradicate, it can in some cases be near impossible to completely kill Onion Weed.