Electricity for Refrigeration, Heating, and Air Conditioning
9th Edition
ISBN: 9781285179988
Author: Russell E. Smith
Publisher: Cengage Learning
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Chapter 2, Problem 17RQ
Where do electrons exist in an atom, and what is their charge?
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In the electron arrangement of a calcium atom, how many electrons are in the second energy level?
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The type of charge possessed by an electron is:
1. negative
2. positive
3. molecular
4. gravitational.
When electrons are in valance band, they conduct electricity.
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Chapter 2 Solutions
Electricity for Refrigeration, Heating, and Air Conditioning
Ch. 2 - All physical objects are composed of __________....Ch. 2 - What is an atom?Ch. 2 - Which of the following is a part of the atom? a....Ch. 2 - What is static electricity?Ch. 2 - Name three ways electricity can be produced.Ch. 2 - What part do protons and electrons play in the...Ch. 2 - Which of the following is the simplest atom that...Ch. 2 - What are the four most important characteristics...Ch. 2 - What is electromotive force?Ch. 2 - Electromotive force is commonly measured in _____....
Ch. 2 - What is current?Ch. 2 - How is current measured? a. amperes b. ohms c....Ch. 2 - What is resistance?Ch. 2 - How is resistance commonly measured? a. amperes b....Ch. 2 - What is electrical power?Ch. 2 - How is electrical power commonly measured? a....Ch. 2 - Where do electrons exist in an atom, and what is...Ch. 2 - True or False: All atoms tend to lose electrons.Ch. 2 - State the law of electric charges.Ch. 2 - What is a proton? Where does it normally exist in...Ch. 2 - Describe briefly the method a dry cell battery...Ch. 2 - What is a conductor?Ch. 2 - Which of the following is the best conductor? a....Ch. 2 - What is an insulator?Ch. 2 - Which of the following is the best insulator? a....Ch. 2 - Why do metals make the best conductors?Ch. 2 - How do electric utility companies charge customers...Ch. 2 - What is the meaning of SEER when used in...Ch. 2 - State Ohms law.Ch. 2 - True or False: Ohms law applies to all types of...Ch. 2 - What is the ampere draw of a 5000-watt electric...Ch. 2 - What is the resistance of the heating element of...Ch. 2 - What is the voltage of a small electric heater if...Ch. 2 - What is the Btu/hour output of an electric heater...Ch. 2 - What is the kilowatt output of an electric heater...
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- The atoms of a material used as an insulator generally contain ___________ valence electrons.arrow_forwardHow much voltage is produced by a silicon solar cell?arrow_forwardThe south pole of one magnet is brought close to the south pole of another magnet. Will the magnets repel or attract each other?arrow_forward
- Which of the following is not the unit for electrical conductivity? Select one: O (0-m) - 1 O N-m O (N-mm) -1 O S/marrow_forwardDon't Use Chat GPT Will Upvotearrow_forwardChemical energy refers to the energy associated with the bonds within nucleus of atom itself. Select one: True Falsearrow_forward
- The topic is Charges as a Quantity.. kindly fill up the table.arrow_forwardfill in the blanks When an element has its proper complement of valence electrons, it is electrically _________; when an atom has more or fewer than that number, it is an ion and has an electric charge. The charge is ________ when extra electrons are present and ________ when some are missing. .The ____________ bond is formed among metallic atoms when some electrons in the valence shell separate from their orbital path and exist in a free state like a cloud or gas. Surrounding the positive nuclei in this highly mobile state, the negative cloud bonds the atoms together. Because the electrons in the cloud do not “belong” to any particular atoms, the bond strengths can vary, deformation can take place without rupture, and good heat and electrical conductivity can occur owing to the easy movement of electrons from one atomic site to the next. This type of bonding makes possible some of the useful characteristics of metals, both mechanical properties and physical properties.arrow_forwardThe __________is that part of an atom that moves from one atom to another. A. electron B. proton C. neutronarrow_forward
- * Recombination is when an electron falls into a hole O a positive and a negative ion bond together a valence electron becomes a conduction electron a crystal is formed O هذا السؤال مطلوبarrow_forwardMetailn are very oood conductors of electricity because: A her bonding is directional they are good thermal isolators C their bonding energies are very high D. their velence electrons are not bound to any particular atomarrow_forwardIf 5.8x1020 electrons are deposited on the positive plate of a capacitor by applied voltage of 40V, find the capacitance of the capacitor? (Analysis)arrow_forward
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