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.).
1 Just boil water and pour it on your weeds, but do NOT pour it on your plants because it will kill them too. 2  In fact, it will kill anything you pour it on, including the beneficial creatures, so use with caution. 3  Vinegar â this works best on young plants because it will not kill the roots of well-established plants.f you already have weeds you can use one of these three things to kill them: 1  Boiling water â this is more effective than many expensive chemical herbicides. 2  Just boil water and pour it on your weeds, but do NOT pour it on your plants because it will kill them too.