Question :
1.What do the dots in a Lewis symbol represent?
A) protons
B) : 1318375
1.What do the dots in a Lewis symbol represent?
A) protons
B) valence electrons
C) innermost (core) electrons
D) the nucleus
E) mass number
2.What is the Lewis symbol of the fluoride ion?
A)
B)
C)
D)
E)
3.What are the two principal classes of bonding called?
A) ionic bonding and nuclear bonding
B) covalent bonding and hydrogen bonding
C) hydrogen bonding and ionic bonding
D) polar bonding and ionic bonding
E) ionic bonding and covalent bonding
4.Which combination of atoms is most likely to form an ionic compound if they are allowed to react with each other?
A) metal and metal
B) metal and nonmetal
C) nonmetal and nonmetal
D) metalloid and metalloid
E) All combinations are likely to form an ionic compound.
5.Which statement about compounds is FALSE?
A) Compounds consist of atoms of two or more different elements that are chemically bonded together.
B) The elements in a compound cannot be separated or recovered by a physical process.
C) Ionic compounds are composed of cations and anions.
D) Covalent compounds are composed of metals and nonmetals.
E) Intermolecular forces are attractive forces between molecules of a compound, and are responsible for the compound’s physical properties.
6.A covalent bond involves which of the following?
A) sharing of electrons between two atoms
B) transfer of electrons between two atoms
C) donation of protons from one atom to another
D) electrostatic attraction between opposite charges
E) sharing of protons between two atoms
7.Which statement about chemical bonds is FALSE?
A) The sharing of electrons between two nonmetals results in a covalent bond.
B) The attraction between oppositely charged ions results in an ionic bond.
C) The electrons in covalent bonds may be shared equally or unequally between the atoms.
D) A bond dipole is the separation of charge that results when atoms sharing electrons have different electronegativity values.
E) A nonpolar covalent bond is one in which electrons are not shared equally between the atoms.
8.What does it mean if an atom is said to have a high electronegativity?
A) The atom requires a large amount of energy to remove an electron from its structure.
B) The atom is highly susceptible to losing a valence electron.
C) The atom has a strong attraction for electrons in a chemical bond.
D) The atom releases a large amount of energy when it gains an electron.
E) The atom has more electrons around it than necessary; the atom has an expanded octet.
9.What region on the periodic table are elements with the lowest electronegativity values found?
A) upper right corner
B) bottom right corner
C) upper left corner
D) bottom left corner
E) middle
10.Considering the electronegativity values indicated in the table, which covalent bond is the most polar?
CClFONH
2.53.04.03.53.02.1
A) C−H
B) N−O
C) Cl−F
D) H−F
E) F−F
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