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 Dandelions In Lawn-What will kill dandelions in your lawn is a systemic selective herbicide. 2  The term, selective herbicide, means it will kill the weeds, not the grass. 3  2,4-D or MCPP are the most effective herbicides for this purpose. Dandelions in Plant Beds, Patios, Sidewalks-What will kill dandelions best in these other locations is a nonselective herbicide. 2  The term, nonselective herbicide, means it will kill any plant it touches, not just dandelions.