Californium Cf Californium is a radioactive metal found in the actinide category of the periodic table. Its standard attomic weight is 251 and is elemenent numer 98. History Californium was first synthesized at the University of California‚ Berkeley by the physics researchers Stanley G. Thompson‚ Kenneth Street‚ Jr.‚ Albert Ghiorso‚ and Glenn T. Seaborg on or about February 9‚ 1950. It was the sixth transuranium element to be discovered; the team announced its discovery on March 17‚ 1950
Premium Chemical element
obtain the masses and relative concentrations of atoms and molecules and to detect isotopes in a sample based on their masses. In order to do this the method requires an instrument called the ‘mass spectrometer’‚ of which‚ is able extract accurate information of the relative masses of isotopes and their relative abundance. This makes the mass spectrometer very useful for applications such as carbon dating and radioactive dating processes because the combination of a mass spectrometer and a gas chromatograph
Premium Isotope Chemistry Atom
Definition of an isotope: An isotope is an Atom with the same number of protons‚ but differing numbers of neutrons. Isotopes are different forms of a single element. Smoke Detectors I) Americium-241 emits alpha particles. II)The alpha particles emitted by the Am-241 collide with the oxygen and nitrogen in air in the detector’s ionisation chamber to produce charged particles (ions). When smoke enters the chamber‚ the smoke particles attach to the charged ions‚ neutralizing them
Premium Television program Reality television Ionizing radiation
a) I definately agree with this statement and how science is ever changing. The scientific method begins by asking a question about something. After asking a question the next step is to form a hypothesis or educated guess. A repeatable expieriment is then created to test said hypothesis‚ and a large amount of data is collected. Data collection then leads Scientits to analyze the data and come up with a conclusion to see if the hypothesis was proven correct or incoreect. If the hypothesis is proven
Premium Scientific method Science Theory
some of the many uses of calcium‚ the element has much to tell about it’s family and classification. Calcium happens to be apart of the Alkali Earth Metals. The element has 20 electrons‚ 20 protons‚ and the number of neutrons in the most abundant isotope is 20. The element belongs to period number 4‚ and is apart of group number 2‚ and out of there being non-metals‚ metals‚ and metalloids‚ calcium happens to be a metal[Emsley]. Characteristics of Calcium- Calcium has much to tell about
Premium Water Chemistry Acid
The Element Niobium Atomic Number: 41 Atomic Weight: 92.90638 Melting Point: 2750 K (2477°C or 4491°F) Boiling Point: 5017 K (4744°C or 8571°F) Density: 8.57 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Metal Period Number: 5 Group Number: 5 Group Name: none What’s in a name? Named for the Greek mythological figure Niobe. Say what? Niobium is pronounced as ni-OH-bee-um. History
Premium Chemical element Atomic number Periodic table
Testable Question: What will happen to different halide salts found in the body if various compounds are added to the halide? How will the halides react? Introduction: For this lab we tested 6 halide salts found in the body‚ and their reactivity when a compound is added. We tested the halides NaF‚ NaCl‚ KBr‚ KI‚ and two unknown halides. To find the reaction of the halide‚ we are adding drops of Ca(NO3)2‚ AgNO3‚ AgNO3 + Na2S2O3‚ and NaOCI + Starch to the halides. Each halide will be separated from
Premium Chemistry Water Oxygen
Thyroid Cancer Thyroid cancer is a cancerous tumor or growth located within the thyroid gland.Thyroid cancer is the most common endocrine cancer. Thyroid cancer is one of the few cancers that has increased in incidence rates over recent years. It occurs in all age groups from children through seniors. The American Cancer Society estimates that there will be about 62‚450 new cases of thyroid cancer in the U.S. in an average year. Of these new cases‚ about 47‚230 will occur in women and about
Premium Cancer Oncology Metastasis
Producing electrical energy from nuclear fuel Introduction Obtaining electricity from nuclear fuel has its base on the radioactive decay. Radioactive decay occurs when an isotope (element with a different number of neutrons in the nucleus) is radioactive‚ because its nucleus is unstable. In time it decays and emits alpha or beta particles‚ they collide with surrounding atoms and make them move faster‚ that provokes thermal energy. That thermal energy released is around a million times bigger than
Premium Nuclear fission Nuclear power
Precambrian According to the Geological Time Scale‚ when did the mass extinction of the dinosaurs happen? 65 million years ago 80 million years ago 285 million years ago 1 billion years ago Which element is used when doing radioactive dating on more recent geological events? Uranium Lead Potassium Carbon Why the element in #9 used for dating on more recent geological events? It is easy to find. It is not dangerous It has a half-life that is not too long
Premium Fossil Geology Geologic time scale