Chapter 10 sv - Nuclear Chemistry AIMS (1).pptx - Remaining Agenda Next Monday Quiz 11 Chapter 10 Finish Chapter 10 Review Next Wednesday Final

Chapter 10 sv - Nuclear Chemistry AIMS (1).pptx - Remaining...

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Remaining Agenda Next Monday: Quiz 11 – Chapter 10 Finish Chapter 10 Review? Next Wednesday: Final Exam (Comprehensive, Chapters 1 – 10) Chapter 10 homework due
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Nuclear Chemistry Chapter 10
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Nuclear Chemistry A nuclear reaction is a reaction in which changes occur in the nucleus of an atom. Atomic nuclei are represented by symbols such as The atomic number is the number of ________. The mass number is the number of _______ and number of __________. 3 mass number ( A ) atomic number ( Z ) Nuclear Chemistry
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Review Write the complete chemical symbol for atoms with the following: 7p, 8n, 7e 14p, 14n, 14e 18p, 22n, 18e 22p, 26n, 22e
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5 Isotopes are atoms of the same element having a different number of ____________ . Nuclear Chemistry
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6 Of the known isotopes of all elements, 264 are stable and 300 are _______ occurring but unstable. A radioactive isotope , called a radioisotope , is unstable and spontaneously emits __________ to form a more stable nucleus. The energy (along with the particles) emitted by a radioactive isotope is called __________. Radioactivity is the emission of radioactive particles and/or energy. An even larger number of radioactive isotopes called _________ isotopes , have been produced in the laboratory. Stable vs Unstable Isotopes
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An alpha (α) particle is a high-energy particle that contains _______ protons and ______ neutrons . alpha particle : or 4 2 He It has a +2 charge and a mass number of 4 . Types of radiation: alpha particles , beta particles , positrons , and gamma radiation . Types of Radiation
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8 A beta (β) particle is a high-energy _______ . beta particle : β or 0 −1 e It has a −1 charge and a negligible mass compared to a proton. A β particle is formed when a neutron ( n ) is converted to a proton ( p ) and an electron ( e ). 1 0 n 1 1 p neutron proton + 0 −1 e particle Types of Radiation
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9 A positron is called an antiparticle of a β particle. Their charges are ________ , but their masses are the same (i.e., effectively zero). A positron has a +1 charge and is called a “ positive electron .” positron: β + or 0 +1 e A positron is formed when a proton is converted to a neutron . 1 0 n 1 1 p neutron proton + 0 +1 e positron Types of Radiation
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10 Gamma rays are high-energy radiation released from a radioactive nucleus. gamma ray: They are a form of _________ , so they have no mass and no charge. Types of Radiation
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11 Types of Radiation
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12 Radioactive decay is the process by which an __________ radioactive nucleus emits radiation. A nuclear equation can be written for this process: original nucleus new nucleus + radiation emitted The following must be _________ on both sides of a nuclear equation : The sum of the _________ numbers ( A ) The sum of the _________ numbers ( Z ) Nuclear Reactions
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13 Alpha emission is the decay of a nucleus by emitting an  particle . Nuclear Reactions
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14 HOW TO Balance an Equation for a Nuclear Reaction Example Write a balanced nuclear equation showing how americium-241 decays to form an  particle.
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