40 The half-life of a radioactive isotope is 693 s.Which of the following is the probability that a nucleus of the isotope will decay in the next second? A A 1/1000 B 1000 C 1000 In2 D 1/1000 In2 相关知识点: 试题来源:
Distinguish (an element or atom) by using a radioactive isotope or an isotope of unusual mass for tracing through chemical reactions. 2 (Chemistry) See tracer. 1 To attach a label to. She labeled the jars before storing them. 1 (heraldry) A charge resembling the strap crossing the horse’...
The microradiation source, which is prepared by focussing ion implantation of a radioactive isotope on a semiconductor material using superconducting magnets and having a radius smaller than 20 microns, is claimed. Independent claims are included for: (1) a method for producing a microsystem; (2)...
The age of the Earth was determined by a) Evidence from the dating of meteorite material b) Radioactive carbon dating of fossils c) The layering of sediment in ancient soils d) Estimating the time it took to cool Any scientific theory for the origin of life must start with the assumption...
Which best describes the nucleus of an atom? A) It is the densest part of the atom B) It has neutrons C) It has protons D) All of the above An atom has 7 electrons in its M - shell and contains 18 neutrons in its...
The microradiation source, which is prepared by focussing ion implantation of a radioactive isotope on a semiconductor material using superconducting magnets and having a radius smaller than 20 microns, is claimed. Independent claims are included for: (1) a method for producing a microsystem; (2)...
A deferred action thermal battery contains a small amt. of a radioactive isotope which is normally positioned so that only a small amt. of the thermal energy generated by the isotope is received by the battery. When the battery is activated, the isotope is automatically moved to a position ...
least a stable non radioactive isotope of at least one atomic element, so the content of o isotope in the manufactured product is higher than its natural content.the isotope is chosen from among the naturally occurring isotopes of natural isotopic abundance of less than 1.2% and less than 1%...
Technology for on demand generation of the medical isotope of MO 99/TC 99M and the like and the radioactive iodic isotope which includes I 131A system for radioisotope production uses fast-neutron-caused fission of depleted or naturally occurring uranium targets in an irradiation chamber. Fast ...
a. What is the starting material? b. What is needed to cause fission? c. What are the products of fission? What is the difference between nuclear fission and nuclear fusion? What are the significances of them both? Which of the follow...