AnswersChemistry 1A - Mr. KaanUnit Test

Unit Test — Unit test Answers

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Which type of substances have chemical bonds that are not directional and valence electrons that move freely between the atoms?

A
halogens
B
nonmetals
C
metals
D
salts
22
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How is electronegativity related to covalent bonding?

A
Atoms must have similar electronegativities in order to share electrons in a covalent bond.
B
Atoms must have very different electronegativities in order to transfer electrons in a covalent bond.
C
Atoms must have similar electronegativities in order to transfer electrons in a covalent bond.
D
Atoms must have very different electronegativities in order to share electrons in a covalent bond.
23

Which statement best explains why a metal atom and a nonmetal atom are most likely to form an ionic bond?

A
Metal atoms have low ionization energy, and nonmetal atoms have high electronegativity, so electrons transfer easily from the nonmetal atom to the metal atom.
B
Metal atoms have low ionization energy, and nonmetal atoms have high electronegativity, so electrons transfer easily from the metal atom to the nonmetal atom.
C
Metal atoms have high ionization energy, and nonmetal atoms have low electronegativity, so electrons transfer easily from the nonmetal atom to the metal atom.
D
Metal atoms have high ionization energy, and nonmetal atoms have low electronegativity, so electrons transfer easily from the metal atom to the nonmetal atom.
24

The periodic table below shows the electronegativity values of some elements.ElectronegativitiesConsider the positions of carbon, nitrogen, potassium, and calcium on the periodic table. The atoms of which element attract electrons most strongly in chemical bonds?

Question illustration
A
carbon (C)
B
calcium (Ca)
C
nitrogen (N)
D
potassium (K)
25

Sugar is made up of clear, colorless crystals that dissolve easily in water, but the crystals and their solution do not conduct electricity. Which statement describes sugar?

A
It is made up of atoms that are held together by metallic bonds.
B
It is made up of atoms that are held together by covalent bonds.
C
It is made up of atoms that are held together by weak ionic bonds.
D
It is made up of atoms that are held together by strong ionic bonds.

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