INTRODUCTION TO NUCLEAR REACTION: The main features of nuclear reactions include radioactive decay, nuclear fission and nuclear fusion. Radioactive decay: Energy is released in a radioactive decay in the form of the kinetic energy of the particle emitted (α and β), the kinetic energy of the daughter nucleus and the energy of the gamma-ray photon that may accompany the decay. The energy involved may be calculated by finding the mass defect of the reaction. The energy released is the energy equivalent of the mass defect of the reaction. Nuclear fission: Nuclear fission is the process in which a large nucleus breaks into two smaller nuclei that are almost equal in mass.
When the shells are full, the atom is unreactive. 3. How the numbers of the different sub-atomic particles determine the properties of the atom and the position of the element of the periodic table. The main nucleus of an atom is made of protons and neutrons. These added together make the relative atomic mass.
Astronomy 10 Chapter 11 1. Both used to be normal stars but the white dwarf ran out of hydrogen, they are both subjected to gravitational theories. A Neutron star is a fluid of neutrons, as hot at its surface as the inside of the sun and has a greater magnetic field. 3. Because its density is so high, neutrons spin in the same way that electrons do so must obey the Pauli Exclusion Principle.
pyridinium hydrobromide perbromide type of stationary phase column length column temperature rate flow of the carrier gas List the 4 general factors that affect the separation obtained on a gas chromatograph What specific technique is used to collect/isolate your purified unknown compound at the end of the recrystallization experiment? suction filtration 14 of 22 4/16/12 9:15 PM StudyBlue Flashcard Printing of Lab Final 2211L UGA
This metastable radioactive isotope has a half-life of less than 5 minutes and is made from the radioactive decay of Cs-137 in a mini-isotope generator. Radioactive Ba-137m decays it turns into the non-radioactive
David Kemp OCR Chemistry A Unit 1: F321 Atomic Structure (a) describe protons, neutrons and electrons in terms of relative charge and relative mass; Proton +1 1 Neutron 0 1 Electron -1 1/2000 Relative Charge Relative Mass (b) describe the distribution of mass and charge Within an atom; Positively charged Nucleus containing most of the mass, surrounded by atomic shells with orbiting electrons of negative charge and negligible mass. (c) describe the contribution of protons and neutrons to the nucleus of an atom, in terms of atomic (proton) number and mass (nucleon) number. The atomic number of the nucleus, also the proton number, shows the number of protons in the nucleus. It also defines the element. The number of neutrons added to the number of protons is the nucleon number or mass number.
Describe the differences between protons and electrons The difference between protons and electrons is that protons are positively charged and that elections are negatively charged. Another difference is that protons are in the nucleus and electrons circle the nucleus in shells outside the nucleus. What is the difference between the mass number and the relative atomic mass of an element? The difference between the mass number and the atomic mass is that the mass number is the number of protons and neutrons in the nucleus and the relative atomic mass is the mass of an atom. Distinguish between an element and a compound with 2 examples for each An element is a substance that cannot be broken down into any simpler substances.
Fluorine April 6th, 2011 Fluorine is the most reactive chemical element and the lightest member of the halogen elements. Fluorine is a nonmetal and is part of group 17 (group VIIa) of the periodic table. Its density is 0.001696 grams per cubic centimeter. Its chemical activity can be attributed to its extreme ability to attract and to the small size of its atoms. Fluorine is a corrosive pale yellow gas.
Nuclear Power is produced by controlled (non-explosive) reactors. They convert the thermal energy released from nuclear fission. When uranium and plutonium are enriched, it undergoes nuclear fission. It releases kinetic energy and gamma radiation. This whole process is called a nuclear chain reaction.
Although some subatomic particles have a greater mass than some atoms. Subatomic particles are made of quarks such as a proton which is made of two up quarks and one down quark. The atom is a basic unit of matter that consists of a dense nucleus surrounded by negatively charged electrons. The atomic nucleus contains a mix of positively charged protons and electrically neutral neutrons. The electrons of an atom are bound to the nucleus by the electromagnetic force.