Why is water considered a polar molecule? A. The oxygen is found between the two hydrogens. B. The oxygen atom attracts the hydrogen atoms. C. Both hydrogens are at one end of the molecule, and oxygen is at the other end. D. The oxygen end of the molecule has a slight negative charge, and the hydrogen end has a slight positive charge.
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- It is a type of bond between a hydrogen atom and a pair of unshared electrons on the electronegative atom of another molecule? a. metallic bond b. sigma bond c. Pi bond d. hydrogen bond ....Why do metals tend to transfer or loose electrons? a. Metals have low electronegativity and ionization energy. b. Metals have high electronegativity and ionization energy. c. Metals have low electronegativity and high ionization energy. d. Metals have high electronegativity and low ionization energy.The partial separation of charge in the water moleculea. results from the electrons’ greater attraction to the oxygen atom.b. means the molecule has a positive end and a negative end.c. indicates that the water molecule is a polar molecule.d. All of the above.
- Chapter 4 Worksheet Answer the following questions. Be sure to check your spelling. In ionic compounds, positively charged a. metals, anions b. nonmetals, cations c. metals, polyatomic ions d. nonmetals, anions e. metals, cations A) lose their valence electrons to become An ionic compound a. has a net positive charge. b. has a net negative charge. c. contains only cations. d. contains only anions. e. has a net charge of zero. 3) Which of the following compounds contains an ionic bond? a. NH3 b. H2О с. СаО d. H2 A group of covalently bonded atoms that has an overall electrical charge is called a(n) a. ionic compound. b. anion c. polyatomic ion. d. cation. e. molecule. In a molecule with covalent bonding, a. oppositely charged ions are held together by strong electrical attractions. b. atoms of metals form bonds to atoms of nonmetals. c. atoms of different metals form bonds. d. atoms are held together by sharing electrons. 10A hydrogen bond is: Select one: O a. an attraction between a hydrogen atom bonded to N, O, or F and an N, O, or F atom on another molecule. b. a covalent bond between H and O. C. an ionic bond between H and another atom. Od. a bond that is stronger than a covalent bond. O e. the polar O-H bond in water. In a solution, the solvent: Select one: O a. is a liquid. O b. can be a liquid or gas. O c. can be a solid, liquid, or gas. O d. is never a solid. e. is the substance present in the smallest concentration.What changes if you increase the electronegativity of an atom increased? a. atomic number b. atom size c. electron density d. atom radius e. all of the above
- TTT One or more positively-charged 1 negatively-charged atoms. A. Ionic bond B. Covalent bond atoms are electrostatically bound to one or more C. Metallic bond D. Hydrogen bond Hydrogen atoms are attached to a very electronegative atom. The hydrogen atom on 2 one molecule is attracted to the electronegative atom on another molecule. A. Ionic bond C. Metallic bond B. Covalent bond D. Hydrogen bond Electrons are not shared. Atoms have gained or lost valence electrons such that they 3 have a full octet of valence electrons. A. Ionic bond B. Covalent bond A. Ionic bond B. Covalent bond C. Metallic bond D. Hydrogen bond Atoms share two or more valence electrons with other atoms such that they have a 4 full octet of valence electrons. C. Metallic bond D. Hydrogen bond 5 The strongest type of chemical bond. A. Ionic bond B. Covalent bond C. Metallic bond D. Hydrogen bond Atoms are so tightly packed together that their valence electrons move freely from 6 atom to atom. A. Ionic bond B.…When sodium chloride dissolves in water, how do the water molecules orient around the ions? Select one: a. Water molecules are randomly oriented around the ions. b. Around sodium the oxygen atoms point toward the sodium, and around chloride the hydrogen atoms point toward the chloride. c. Around sodium the hydrogen atoms point toward the sodium, and around chloride the oxygen atoms point toward the chloride. d. The hydrogen atoms point toward both the sodium and the chloride. e. The oxygen atoms point toward both the sodium and the chloride.1. Water is a polar molecule and has a very unique structure. A. What is a polar molecule? B. Draw one molecule of water and label the hydrogen & oxygen atoms. Label the positive (+) and the negative (-) region of the molecule.
- In order to break a covalent bond, what direction must energy flow? A. Energy is neither released or absorbed because energy cannot be created or destroyed b. Energy is absorbed from the surrounding to the system c. Energy is released from the system to the surroundings d. Energy may be released or absorbed depending on the polarity of the covalent bond.A.State the number of valence electrons for a sodium ion in an ionic bond. B.State the number of valence electrons for a sulfide ion in an ionic bond. Express your answer as a signed integerAnswer each of the following questions correctly. Choose the correct answer. 1. It is a measure of how equally the electrons in a bond are distributed between the two atoms involved in a covalent bond. a. Polarity b. Octet rule c. Ionization energy d. Electron affinity 2. The shape of bonding molecular orbital shows that the greatest electron density is in the region. a. Between the two nuclei b. Close to the more atom electronegative c. Close to the bigger atom d. Uniformly around the two nuclei 3. In which compound is the bond that has the most ionic character found? a. HCl b. Kl c. MgS d. NO