Homework Answers
28) In ionic bond, valence electrons of atom transferred
ermanently to another atom.
Answer : Ionic bond
29) Soltion is a homogenous mixture of solutes dissolved in
solvent.
Answer : The atmosphere
30) An electron has a negative charge of 1.6 x 10-19 C
Answer : An electron
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28 In which of the following types of chemical bond is one or more electron(s) completely...
Which one of the bonds: lonic, covalent, metallic, and Van der Waal doesn't involve electron sharing...
Which one of the bonds: lonic, covalent, metallic, and Van der Waal doesn't involve electron sharing or transfer, and called secondary bonding? Ans: Charge on an electron is -1.6 x 10°C. What does C stand for? Ans: Fill in the blanks in questions with 3. than in its Isotope of an element has a greater number of nucleus. A proton or a neutron has a mass equal to 1.66 x 10-24g, this mass is also called -. If 1.66 x...
20. How do atoms achieve noble-gas electron configurations in single covalent bonds? a. One atom completely...
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Which of the following is NOT one of the six elements that make up 95% of...
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1. An) is used to represent a compound. a) symbol b) equation c) subscript d) formula...
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Pre-Lab Exercise 2-3 Chemical Bonding One of the more challenging concepts to grasp in chemistry is chemical bonding, a topic that pops up again and again in A&P: We revisit it in cytology, the nervous system, blood, respiration, and digestion-to name just a few First let's do some basics. Use your textbook and this unit to answer the following questions 1. Do metals donate or accept electrons? What do they become after they donate/accept electrons? 2. Do nonmetals donate or...
Multiple-Cholce: Select the best answer to each of these multiple choice 1. Which of the following...
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1) Define the following: matter, element, atom, trace element, proton, electron, neutron, atomic number, mass number,...
1) Define the following: matter, element, atom, trace element, proton, electron, neutron, atomic number, mass number, isotopes, radioisotope, molecule, compound, salt, ion. 2) List the 6 elements that make up about 99% of the weight of an organism. 3) What are the functions of the trace elements iron, fluorine (fluoride), and iodine? 4) An iodine deficiency can result in goiter. True/False 5) Where are protons, neutrons and electrons located? 6) Can you determine the atomic number and mass number from...
1. Which one of the following is most likely to be an ionic compound? A) CaCl2...
1. Which one of the following is most likely to be an ionic compound? A) CaCl2 B) CO2 C) CS2 D) SO2 E) OF2 2. Which one of the following ionic solids would have the largest lattice energy? A) NaCl B) NaF C) CaBr2 D) CsI E) CaCl2 3. Calculate the energy change for the reaction K(g) + I(g) → K+(g) + I – (g) given the following ionization energy (IE) and electron affinity (EA) values. IE K: 419 kJ/mol...
17. The distance between an electron and a hole across a band gap following electronic excitation...
17. The distance between an electron and a hole across a band gap following electronic excitation is called A. Bohr exciton radius B. Bohr radius C. quantum D. conduction band 18. When a photon strikes an atom, the energy is absorbed by A. a proton which moves to an excited state. B. a neutron which causes the nucleus to split. C. an electron which moves from the ground to an excited state. D. nothing. A photon is never absorbed by...
Problem 1 Concept: Elementary Particles 0 Not finished! Level: Basic Emission of which particle below will...
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Which one of the bonds: lonic, covalent, metallic, and Van der Waal doesn't involve electron sharing or transfer, and called secondary bonding? Ans: Charge on an electron is -1.6 x 10°C. What does C stand for? Ans: Fill in the blanks in questions with 3. than in its Isotope of an element has a greater number of nucleus. A proton or a neutron has a mass equal to 1.66 x 10-24g, this mass is also called -. If 1.66 x...
20. How do atoms achieve noble-gas electron configurations in single covalent bonds? a. One atom completely loses two electrons to the other atom in the bond. b. Two atoms share two pairs of electrons. C. Two atoms share two electrons. d. Two atoms share one electron 21. Why do atoms share electrons in covalent bonds? a to become ions and attract each other b. to attain a noble-gas electron configuration c. to become more polar d. to increase their atomic...
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1. An) is used to represent a compound. a) symbol b) equation c) subscript d) formula 2. atoms or groups of atoms are called ions. a) charged b) diatomic c) neutral d) monatomic 3. For the formula of a compound to be correct, the algebraic addition of the charges on atoms or ions in the compound must add up to _ a) zero b) one c) two d) four 4. Potassium bromide is an example of an) compound a) molecular...
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