b. dispersion
Definition of Dispersion by Mimiwhatsup: a mixture in which fine particles of one kind of substance is scattered throughout another substance.
Answer: I did it so you guys don't have to
1. Which of the following elements can form diatomic molecules held together by triple covalent bonds? (1 point)
Unselected answer (0 pts) carbon
Unselected answer (0 pts) oxygen
Unselected answer (0 pts) fluorine
Correct answer (1 pt) nitrogen
1 /1 point
2. When H+ forms a bond with H2O to form the hydronium ion H3O+, this bond is called a coordinate covalent bond because ___. (1 point)
Correct answer (1 pt) both bonding electrons come from the oxygen atom
Unselected answer (0 pts) it forms an especially strong bond
Unselected answer (0 pts) the electrons are equally shared
Unselected answer (0 pts) the oxygen no longer has eight valence electrons
1 /1 point
3. What type of bond is most likely to be formed between two fluorine atoms? (1 point)
Incorrect Answer (0 pts) an ionic bond
Unselected answer (1 pt) a nonpolar covalent bond
Unselected answer (0 pts) a polar covalent bond
Unselected answer (0 pts) a hydrogen bond
0 /1 point
4. When placed between oppositely charged metal plates, the region of a water molecule attracted to the negative plate is the ____. (1 point)
Correct answer (1 pt) hydrogen region of the molecule
Unselected answer (0 pts) geometric center of the moleculec
Unselected answer (0 pts) H—O—H plane of the molecule
Unselected answer (0 pts) oxygen region of the molecule
1 /1 point
5. Which of the forces of molecular attraction is the weakest? (1 point)
Unselected answer (0 pts) dipole interaction
Correct answer (1 pt) dispersion
Unselected answer (0 pts) hydrogen bond
Unselected answer (0 pts) single covalent bond
1 /1 point
6. What causes dipole interactions? (1 point)
Unselected answer (0 pts) sharing of electron pairs
Correct answer (1 pt) attraction between polar molecules
Unselected answer (0 pts) bonding of a covalently bonded hydrogen to an unshared electron pair
Unselected answer (0 pts) attraction between ions
1 /1 point
7. What is required in order to melt a network solid? (1 point)
Unselected answer (0 pts) breaking Van der Waals bonds
Unselected answer (0 pts) breaking ionic bonds
Unselected answer (0 pts) breaking hydrogen bonds
Correct answer (1 pt) breaking covalent bonds
1 /1 point
