STUDY GUIDE ANSWERS The Earth’s History Section 14-2 REVIEW VOCABULARY REVIEW radioactive isotope is an isotope whose nucleus tends to release particles‚ radiant energy‚ or both; radioactive dating is a technique for determining the age of a material by measuring the amount of a particular radioactive isotope the material contains. radioactive decay is the release of particles‚ radiant energy‚ or both by a radioactive isotope half-life is the time it takes for one-half of any size
Premium Radioactive decay Chemical element Isotope
one is‚ his discovery of the an atom’s nuclear structure The atom now consist of a positive nucleus with negative electrons in circular orbits around it. In addition to this‚ he discovered that atoms have a dense core (nucleus) where protons and neutrons are located. Along
Premium Atom Physics General relativity
We all are aware of the basic states of matter i.e. solids‚ liquids‚ gases‚and plasma. But apart from these there’s an entire range of alternative synthetic states of matter: Bose–Einstein condensate‚neutron degenerate matter‚ supersolids/superfluids‚ etc. The difference is that these alternative states are actually lab-synthesised and don’t have much significance in the real world of nature. And now‚ a team of researchers at Japan’s Tohoku University have claimed to synthesise an entirely new metal
Premium Atom Electron Energy
1896‚ when Antoine Henri Becquerel discovered radioactivity in Uranium. The next step came in 1902 when Marie and Pierre Curie isolated radioactive metal called Radium. In 1934‚ Enrico Fermi of Italy disintegrated heavy atoms by spraying them with neutrons. Unfortunately‚ he didn’t realize that he had achieved nuclear fission‚ In December 1938‚ Otto Hahn and Fritz Strassman in Berlin did a similar experiment with Uranium and were
Premium Nuclear fission Uranium Nuclear power
Siilicon is the closely related elements with boron. Boron is used in pyrotechnics and flares to produce a green color. Boron has also been used in some rockets as an ignition source. Boron is used to control nuclear reactions. It is an excellent neutron absorber. Alloyed with steel or reacted with carbon‚ titanium or zirconium‚ it is used in control rods for nuclear reactors Boron is an essential nutrient for all green plants Bibliography: http://chemtopics.com/elements.htm http://www.webelements
Premium Chemical element Periodic table Carbon
known to have 27 radioactive isotopes but 7 regular isotopes. Ruthenium is solid at room temperature and looks like a hard‚ silvery-white metal with a shiny surface ( See page 2 for picture. ).The 3 main types of subatomic particles are protons‚ neutrons‚ and electrons. To humans Ruthenium is highly toxic and carcinogenic‚ and shouldn’t be touched if came into contact with. Five fun facts about is one‚ Ruthenium was founded in 1844 by Karl Ernst Claus. Also‚ the metal is used as a hardener for
Premium Nuclear fission Uranium Nuclear power
of the greatest wonders of modern science. It is a substitute for the human brain. In every sphere of life man has been using computer. The invention of nuclear energy is a great wonder of modem science. Now man can make Atom Bomb‚ Hydrogen Bomb‚ Neutron Bomb‚ Missiles etc. with the help of this energy. Space travel is the most wonderful success of modern science. To land on the moon was out of man’s imagination just a few years ago. Biopsy and Ultrasonography‚ E.C.G‚ Ultra-violet ray‚ X-ray and
Premium Nuclear weapon Brain Science
(man-elements) are created‚ or why do we benefit in creating them? Elements are the building blocks of which all things are composed. The elements of Earth are made up of atoms. All atoms possess a nucleus of positively charged protons as wells and neutrons which are neutrally charged. Surrounding the nucleus is a low density area containing negatively charged electrons that are equal to the number of protons within the nucleus. The number of protons within an atom determines the element that it composes
Free Chemical element Atom Atomic number
Nuclear energy is created in nuclear power plants‚ specifically designed to withstand the process of nuclear fission. At a nuclear power plant‚ nuclear fission occurs inside the reactor containing a core with uranium pellets. As the atoms break open‚ neutrons are released. These then bump and break open other uranium atoms. This continuous process of breaking and bumping is called a chain reaction. When the uranium nuclei split‚ heat is released‚ boiling water into steam which drives large turbine blades
Premium Nuclear fission Nuclear power Uranium
Democritus 1 Democritus Democritus was a Greek Philosopher born 460 B.C. in the city of Abdera‚ and died 370 B.C. He was born into a wealthy family and traveled the world extensively. He was known as the “laughing” philosopher‚ or the “happy” philosopher because he would constantly mock people‚ and laugh incessantly about his own jibes. Throughout his life he wrote over 70 books‚ however very few pages have survived the years. Some have said that Democritus blinded himself to better understand
Premium Atom Neutron Electron