Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Theoretical and experimental justification for the Schrödinger equation wikipedia , lookup
Quantum electrodynamics wikipedia , lookup
Dirac equation wikipedia , lookup
Introduction to quantum mechanics wikipedia , lookup
Elementary particle wikipedia , lookup
Relativistic quantum mechanics wikipedia , lookup
Nuclear structure wikipedia , lookup
Section 25.2 Name_____________________ Per_______________ 1. Identify the following as alpha, beta or gamma a. _____________ a fast moving electron b. _______________β 4 c. ________________ 2 He 0 c. ______________ -1 e d. _______________ He nucleus f. _____________more energy than x-rays e. ________________α g. _______________2p + 2n h. ______________ 2. Finish the equation: Hint: the total mass (top #) on the left side of the equation must equal the total mass on the right side of the equation. The same is true for the atomic number (bottom #) 208 a. alpha decay of francium-208: 87Fr → _____________ + ______________ 37 b. beta emission by argon-37: 18Ar → _____________ + _______________ Be + ____________ → _________________ 7 c. electron capture by beryllium-7: 4 3. Use the following word bank to complete the section below: atomic number nuclear bombardment band of stability positron beta billions radioactive decay half-life rate stable made transmutation Nuclei that lie outside the _____________________ undergo spontaneous radioactive decay. Nuclei with too many neutrons undergo ______________ emission as neutrons are converted to protons and give off a high-speed electron. A ____________________ is a particle with a positive charge and the mass of an electron. Every radioisotope decays at a characteristic _______________. A ___________________ is the time required for one half of the nuclei in a radioisotope to decay into another element. The product nuclei may or may not be ______________________. Half-lives vary from fractions of a second to ________________ of years. The conversion of atoms of one element to atoms of another is called _____________________. This process can occur by _________________________ or by __________________________________ which is when particles bombard the nucleus of an atom. All of the elements with _________________ above 92 have been ________________ in nuclear reactors or accelerators.