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Bonds A
Bonds B
Bonds C
100
What occurs when an atom of chlorine and an atom of hydrogen become a molecule of hydrogen chloride? a. A chemical bond is broken and energy is released b. A chemical bond is broken and energy is absorbed c. A chemical bond is formed and energy is released d. A chemical bond is formed and energy is absorbed
c. A chemical bond is formed and energy is released
100
What is the total number of electrons shared in a double covalent bond between 2 atoms? a. 1 b. 2 c. 8 d. 4
d. 4
100
A solid substance was tested in the laboratory. The test results are listed below. dissolves in water is an electrolyte melts at a high temperature Based on these results, the solid substance could be a. CuBr2 b. C c. C6H12O6 d. Cu
a. CuBr2
200
Based on the Reference Tables, the atoms of which of these elements have the strongest attraction for electrons in a chemical bond? a. N b. Na c. P d. Pt
a. N
200
Which type of bonding is found in all molecular substances? a. covalent bonding b. hydrogen bonding c. ionic bonding d. metallic bonding
a. covalent bonding
200
Covalent bonds are formed when electrons are a. transferred from one atom to another b. shared between 2 atoms c. captured by the nucleus d. mobile within a metal
b. shared between 2 atoms
300
If the electronegativity difference between the elements in compound NaX is 2.1, what is element X? a. Bromine b. Chlorine c. Fluorine d. Oxygen
a. Bromine
300
Which statement correctly describes diamond and graphite, which are different forms of solid carbon? a. They differ in their molecular structure, only b. They differ in their properties, only c. They differ in their molecular structure and properties d. They do not differ in their molecular structure or properties
c. They differ in their molecular structure and properties
300
The bond between Br atoms in a Br2 molecule is a. covalent and is formed by the sharing of 2 valence electrons b. ionic and is formed by the transfer of 2 valence electrons c. ionic and is formed by the sharing of 2 valence electrons d. covalent and is formed by the transfer of 2 valence electrons.
a. covalent and is formed by the sharing of 2 valence electrons
400
What occurs when an atom loses an electron? a. The atom's radius decreases and the atom becomes a negative ion. b. The atom's radius decreases and the atom becomes a positive ion. c. The atom's radius increases and the atom becomes a negative ion. d. The atom's radius increases and the atom becomes a positive ion.
b. The atom's radius decreases and the atom becomes a positive ion.
400
Which characteristic is a property of molecular substances? a. good heat conductivity b. good electrical conductivity c. low melting point d. high melting point
c. low melting point
400
A substance that does not conduct electricity as a solid but does conduct electricity when melted is most likely classified as a. a nonmetal b. a metal c. an ionic bond d. a molecular compound
c. an ionic bond
500
Which types of bond results when one or more valence electrons are transferred from one atom to another? a. an ionic bond b. a hydrogen bond c. a nonpolar covalent bond d. a polar covalent bond
a. an ionic bond
500
Which substance contains metallic bonds? a. Hg(l) b. H2O (l) c. NaCl(s) d. C6H12O6(s)
a. Hg(l)
500
Which type of bond is found in sodium bromide? a. covalent b. hydrogen c. ionic d. metallic
c. ionic