Question 1

How many electrons will lithium gain or lose when it forms an ion?

Accepted Answer

A)  lose 1
B)  gain 5
C)  lose 2
D)  lose 3
E)  gain 1 A

Question 2

How many valence electrons does nitrogen have?

Accepted Answer

A)  one
B)  two
C)  three
D)  four
E)  five E

Question 3

Choose the best electron-dot structure for OCl2 .

Accepted Answer

A)   2 . 
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Question 4

The strongest interactions between molecules of iodine I2 are examples of

Accepted Answer

A)  ionic bonds.
B)  covalent bonds.
C)  hydrogen bonds.
D)  dipole-dipole interactions.
E)  dispersion forces.

Question 5

What is the formula of the nitride ion?

Accepted Answer

A)  N3-
B)  NO2-
C)  NO₃3-
D)  NO₃2-
E)  NO₃-

Question 6

The carbon tetrachloride molecule, CCl4 , has the shape of a

Accepted Answer

A)  tetrahedron.
B)  square.
C)  cube.
D)  circle.
E)  sphere.

Question 7

A(n) ________ is the smallest neutral unit of two or more atoms held together by a covalent bond.

Accepted Answer

A)  ionic compound
B)  nucleus
C)  molecule
D)  formula
E)  unit

Question 8

A group of covalently bonded atoms that has an overall electrical charge is called a(n)

Accepted Answer

A)  ionic compound.
B)  anion.
C)  polyatomic ion.
D)  cation.
E)  molecule.

Question 9

In an electron-dot structure of an element, the dots are used to represent

Accepted Answer

A)  all of the electrons in the atom.
B)  the valence electrons.
C)  the electron arrangement.
D)  only the electrons that will participate in bond formation.
E)  the electrons that the element will gain when it forms a compound.

Question 10

What is the symbol for the ion with 19 protons and 18 electrons?

Accepted Answer

A)  F+
B)  F-
C)  Ar+
D)  K-
E)  K+

Question 11

The weakest type of force between particles of a substance is termed ________.

Accepted Answer

The answer of The weakest type of force between particles...

Question 12

Which one of the following compounds contains an ion with a 3+ charge?

Accepted Answer

A)  KCl
B)  Na2O
C)  FeCl₃
D)  CuCl
E)  MgCl₂

Question 13

What is the formula for aluminum nitrite?

Accepted Answer

A)  Al2NO2
B)  AlNO₃
C)  Al(NO2) 3
D)  Al2(NO₃) 3
E)  Al2(NO2) ₂

Question 14

Are hydrogen bonds stronger or weaker than covalent bonds?

Accepted Answer

The answer of Are hydrogen bonds stronger or weaker than...

Question 15

Valence electrons are electrons located

Accepted Answer

A)  in the outermost energy level of an atom.
B)  in the nucleus of an atom.
C)  in the innermost energy level of an atom.
D)  throughout the atom.
E)   in the first three shells of an atom.

Question 16

Choose the best electron-dot structure for CH2Cl₂ .

Accepted Answer

A)   2Cl₂ . 
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Question 17

The strongest interactions between molecules of hydrogen chloride are

Accepted Answer

A)  ionic bonds.
B)  covalent bonds.
C)  hydrogen bonds.
D)  dipole-dipole interactions.
E)  dispersion forces.

Question 18

In a covalently bonded molecule, the number of electrons that an atom shares with others is usually equal to the number of electrons

Accepted Answer

A)  in the atom.
B)  in its nucleus.
C)  in all the atoms.
D)  in its ion.
E)  needed to give it a stable electron configuration.

Question 19

An anion always

Accepted Answer

A)  has a positive charge.
B)  contains a group of two or more atoms with a positive charge.
C)  contains a metal and a nonmetal.
D)  forms covalent bonds.
E)  has a negative charge.

Question 20

A polar covalent bond is found in which of these compounds?

Accepted Answer

A)  H2O
B)  F2
C)  NaCl
D)  H2
E)  N2

Exam 6: Ionic and Molecular Compounds