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Chemistry - Unit 4 Test Review Questions and Answers Graded A+
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Chemistry - Unit 4 Test ReviewMatch the terms to their correct answers
_____ 1. bond
_____ 2. covalent bond
_____ 3. ionic compound
_____ 4. polar covalent bond
_____ 5. electronegativity
B. electrons unequally shared by two atoms
C. ability of an atom to attract shared electrons to itself
D. force that holds atoms together
E. formed by a metal and a nonmetal
F. electrons shared by two atoms - answer1. D
2. F
3. E
4. B
5. C
When electrons are transferred from one atom to another, we say the bond is _____
(A) ionic
(B) polar covalent
(C) doubled
(D) pure covalent
(E) lacking an electron - answerA
Covalent compounds are most likely to be formed between _____.
(A)metals and nonmetals
(B) metals and metals
(C) nonmetals and nonmetals
(D) metals and semimetals
(E) nonmetals and semimetals - answerC
The relative ability of an atom in a molecule to attract electrons to itself is called ____.
(A)ionization potential
(B)metallic character
(C) electron affinity
(D) ionization energy
(E) electronegativity - answerE
The lowest ionization energies are found in the _____ of the periodic table.
(A) upper left
, (B) lower left
(C) upper right
(D) lower right
(E) middle - answerB
The smaller the difference in electronegativities between two atoms, the more likely the
bond between them will be _____.
(A) partially formed
(B) very weak
(C) pure covalent
(D) ionic
(E) polar covalent - answerC
Water is such a good solvent because its _____ allow(s) it to be attracted to polar or
ionic solutes.
(A)bonds
(B) polarity
(C) oxygen
(D) hydrogen
(E) density - answerB
The sulfide ion would have _____ electron(s) shown in its Lewis structure.
(A) zero
(B) one
(C) two
(D) seven
(E) eight - answerE??
Which of the following molecules has dipole moment?
(A) O2
(B) N2
(C) HCl
(D) CO2 - answerC
Which of the following does not have covalent bonds?
(A) H2O
(B) SO2
(C) K2O
(D) PCl3 - answerC
The elements that can most effectively remove electrons from metals are on the
__________ of the periodic table.
(A) Lower left
(B) Lower right
(C) Upper right
(D) Upper left
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