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.).
This is a problem and will take some careful doing. Using the herbicide roundup, Carefully paint the leaves of the weeds. This herbicide will kill or damage any plant it touches, so take care not to drip it on the ground cover.The weeds should die in 10 days.If they are persistant you may have to do it again in spring.Best Nancy.sing the herbicide roundup, Carefully paint the leaves of the weeds. This herbicide will kill or damage any plant it touches, so take care not to drip it on the ground cover. The weeds should die in 10 days. If they are persistant you may have to do it again in spring. Best Nancy.