Wednesday, November 27, 2019

10 Actinium Facts

10 Actinium Facts Actinium is a radioactive metal that is the first element of the actinide series. Its sometimes considered the third element in Row 7 (last row) of the periodic table or in Group 3 (IIIB), depending on which chemist you ask. Here are 10 interesting facts about actinium. 10 Actinium Facts Actinium has atomic number 89, meaning each atom of the element has 89 protons. Its element symbol is Ac. It is an actinide, which also makes it a member of the rare earth element group, which is itself a subset of the transition metals group.Actinium was discovered in 1899 by French chemist Andre Debierne, who suggested the name for the element. The name comes from the Greek word aktinos or aktis, meaning ray or beam. Debierne was a friend of Marie and Pierre Curie. Some sources suggest he worked with Marie Curie to discover actinium, using a pitchblende sample from which polonium and radium had already been extracted (discovered by the Curies).Actinium was independently discovered again in 1902 by German chemist Friedrich Giesel, who had not heard of Debiernes work. Giesel suggested the name emanium for the element, which comes from the word emanation, meaning to emit rays.All isotopes of actinium are radioactive. It was the first non-primordial radioactive element to be isolated, even though other radioactive elements had been identified. Radium, radon, and polonium were discovered before actinium but werent isolated until 1902. One of the more noteworthy actinium facts is that the element glows blue in the dark. The blue color comes from the ionization of gases in the air by radioactivity.Actinium is a silver-colored metal that has properties similar to those of lanthanum, the element located directly above it on the periodic table. The density of actinium is 10.07 grams per cubic centimeter. Its melting point is 1050.0Â °C and boiling point is 3200.0Â °C. Like other actinides, actinium readily tarnishes in the air (forming a white actinium oxide layer), is extremely dense, is highly electropositive, and likely forms numerous allotropes. The other actinides readily form compounds with nonmetals, although actinium compounds are not well-known.Although it is a rare natural element, actinium does occur in uranium ores, where it forms from the radioactive decay of uranium and other radioisotopes, such as radium. Actinium is present at an abundance of 0.0005 parts per trillion by mass in the Earths crust. Its abundance in the solar system is negligible overall. There is about 0.15 mg of actinium per ton of pitchblende. Although it is found in ores, actinium is not commercially extracted from minerals. High-purity actinium may be made by bombarding radium with neutrons, causing the radium to decay in a predictable fashion into actinium. The primary use of the metal is for research purposes. It is valuable neutron source because of its high activity level. Ac-225 may be used for cancer treatment. Ac-227 may be used for thermoelectric generators, as for spacecraft.36 isotopes of actinium are known- all radioactive. Actinium-227 and actinium-228 are the two that occur naturally. The half-life of Ac-227 is 21.77 years, while the half-life of Ac-228 is 6.13 hours.One interesting factoid is that actinium is about 150 times more radioactive than radium!Actinium presents a health hazard. If ingested, it is deposited into the bones and the liver, where radioactive decay damages cells, potentially leading to bone cancer or other illnesses.

Saturday, November 23, 2019

5 Steps to Turning Your Professional Goals Into Realities

5 Steps to Turning Your Professional Goals Into Realities When in pursuit of major goals, it can be very easy to get bogged down in set-backs, failed attempts, and obstacles. Having a big goal as your only end game can be extremely daunting, and can often lead to giving up. Here are 5Â  strategies for rethinking how we outline our professional goals to achieve success more quickly–without quite so much anxiety.1. Make a perspective shiftWhen Thomas Edison said he came up with 10,000 ways how not to invent the light bulb, he didn’t classify himself as a failure times 10,000. He didn’t even view these 10,000 attempts as failures; they were merely ways of ruling out the wrong strategies. The moral here is to turn your failures into stepping stones toward your success. Reframe your minor stumbling blocks into paths forward, and keep your eye on the prize.2. Sweat the small stuffAnd by sweat we mean celebrate. In going after the big goals, it’s important to keep in mind that a certain amount of patience is required. These things don’t happen overnight. Rather than slog for years to get that big brass ring, why not take a little time out to celebrate the smaller victories along the way? The added boost can build up valuable momentum and can actually help you reach your end goals in better time.3. Experience and show gratitudeThe same goes for being grateful and appreciative of what we have achieved so far. It isn’t all or nothing. It’s important to stay humble and also to realize how much more we may have achieved or realized in our careers than others who never get the chance. It’s not all about the big goal. It’s important to appreciate the milestones along the way and show a little gratitude.4. Set yourself up for successIt’s often the small, regular habits and routines that train our brains and work ethics to keep striving for success and moving forward. Make sure you’re building these habits into your workdays and goals lists. Good habits are just as hard to break!5. Be in the presentIt’s important to keep your eye on the future in setting your goals. But it’s also crucial not to lose track of the present moment. Don’t take anything for granted. Don’t disregard any project because it seems insignificant compared to your ideal finale. Realize that it’s the combination of your efforts over the years that will make your success achievable.Remember: Don’t put too much pressure on yourself. Break your larger goals down into smaller, more manageable ones- and don’t forget to celebrate when you achieve them. Reward yourself; it will keep you going! Track your progress along the way towards your ultimate end goal. But do remember to keep things in the proper perspective. If you do all this, success will be within your reach, and the journey towards it will be much more enjoyable.

Thursday, November 21, 2019

Case study Example | Topics and Well Written Essays - 250 words - 110

Case Study Example Though there is no consensus with many members having dissenting opinions on the capacity of embracing technology to solve their problems at hand. Some of dissenting opinion with being pro technology is the capability that the technology bring, which the chief executive officer so much believe in and has to building trust when the subordinate are under the watch always with the spyware. This presents a problem of mistrust and fear within the company. Trust is needed for the company to be reputable and cooperative. It emerges that the transitioning from the founders of the company to the current CEO of the company did not have more of technology but it advanced. The previous regime based their property on the research that enabled them to know area of opportunity, threats and strength. With such knowledge, it was easy for the company to grow. The root cause of the stalemate and problem was the new chief executive office coming up with almost sudden change. According to research done by Carr & Trahant change is not something that should be done once but introduce slowly to allow people to familiarize with. The new chief executive came with philosophy of embracing technology which appeared to be skewed toward spying employees. This cause discourse within the board. The strategic position has negatively impacted by the problem in a number of ways. First the resistance of being pro technology delays the program. Use of spyware is also observe as absence of trust hence bringing the divisions in the