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.).
Thistles of Nebraska Introduc  on Thistles have long been a concern to agriculture and to the public in general. Canada thistle has been on the Noxious Weed List since 1873.Landowners and homeowners realize this plant was a serious problem and needed to be controlled.ses and Values: Plumeless thistle is an important plant for buÂ©erâï¬ies. Its seeds are eaten by numerous species of songbirds. Poisoning: Plumeless thistle may accumulate nitrates, but it is unpalâatable to livestock. Other: Plumeless thistle is an aggressive weed and is similar to the closely related musk thistle.