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.).
Cover the soil between your plants and along rows. Keep the mulch a few inches from the base of your plants to also discourage insect invasions. For mulch, you can use materials such as wheat straw, shredded leaves, or other organic matter.Layer it on the ground about 2 inches thick.o kill weeds quickly without. To kill weeds quickly without danger, spray plain vinegar (5% acetic acid) on their leaves. Use a shield or caution not to spray leaves of valuable plants, because they will die.