Question 1

The bond angle in the molecule H₂S is ________ because the ________.

Accepted Answer

The bond angle in H2S is less than 109.5° because the presence of lone pairs on the sulfur atom repels the bonding pairs of electrons, forcing the hydrogen atoms closer together and reducing the bond angle.

Question 2

Which of the following molecules has a CCH bond angle of 180°?

Accepted Answer

HCCH (also known as acetylene) has a linear shape with a bond angle of 180°. The other options have CCH bonds with different bond angles.

Question 3

According to VSEPR theory,a molecule with three charge clouds including one lone pair would have a ________ shape.

Accepted Answer

A molecule with three charge clouds, including one lone pair, will have a bent shape due to the repulsion between the lone pair and the bonding pairs, which causes the bond angle to decrease.

Question 4

A section of the Periodic Table containing main group elements is shown.If the elements W,X,Y,and Z have electronegativity values of 1.0,2.0,2.5,and 3.5,respectively,which bond is ionic?

Accepted Answer

The answer of A section of the Periodic Table containing...

Question 5

Explain how it is possible for CCl₄ to have polar bonds but be a non-polar molecule.A diagram may be helpful in your answer,but it must be explained.

Accepted Answer

The answer of Explain how it is possible for CCl₄...

Question 6

A bond where the electrons are shared equally is called a(an)________ bond.

Accepted Answer

In a nonpolar covalent bond, the electrons are shared equally between the atoms involved. This occurs when two atoms of the same element bond to each other, or when atoms of different elements with similar electronegativities bond. Polar covalent bonds involve unequal sharing of electrons, while coordinate covalent bonds involve one atom contributing both electrons to the bond. Ionic bonds involve a transfer of electrons, rather than sharing.

Question 7

Consider a bent molecule,such as H₂Se,in which the central atom has two lone pairs of electrons.The electronegativities of H and Se are 2.1 and 2.4,respectively.Based on these values and on consideration of molecular geometry,the H-Se bond can be considered almost ________ and the molecule is ________.

Accepted Answer

The answer of Consider a bent molecule,such as H₂Se,in which...

Question 8

What is the systematic name of ICl₃?

Accepted Answer

The systematic name of ICl₃ is derived from the prefixes and suffixes used for each element. "Iodine trichloride" is the name for this compound as "tri" indicates three and "iodine" and "chloride" represent the elements present in the compound.

Question 9

The carbon dioxide molecule is linear.The electronegativities of C and O are 2.5 and 3.5,respectively.Based on these values and on consideration of molecular geometry,the C-O bond is ________ and the molecule is ________.

Accepted Answer

The C-O bond is polar due to the difference in electronegativity between carbon (2.5) and oxygen (3.5). However, because the CO2 molecule is linear, the polarities of the two C-O bonds cancel each other out, making the molecule nonpolar.

Question 10

Consider the molecule SiCl₄.The electronegativity values for Si and Cl are 1.8 and 3.0,respectively.Based on these values and on consideration of molecular geometry,the Si-Cl bond is ________ and the molecule is ________.

Accepted Answer

The molecule is polar because the Si-Cl bond is polar due to the large electronegativity difference between Si (1.8) and Cl (3.0). However, the molecule as a whole is nonpolar due to its symmetrical tetrahedral geometry with the two ₄ groups cancelling out the dipole moment of the Si-Cl bond. Therefore, the correct answer is C (polar; nonpolar).

Question 11

The water molecule has a ________ geometry because its central atom has ________ bonds and ________ lone pairs of electrons.

Accepted Answer

The water molecule has a bent geometry because its central atom (oxygen) has two bonds and two lone pairs of electrons. The lone pairs repel more strongly than the bonded pairs, causing the molecule to adopt a bent shape.

Question 12

A section of the Periodic Table containing main group elements is shown.Which bond would be least polar?

Accepted Answer

The answer of A section of the Periodic Table containing...

Question 13

Which element listed is the least electronegative?

Accepted Answer

Hydrogen is the least electronegative element among the options given. It has only one electron in its outermost shell and, therefore, tends to lose it rather than gain electrons, resulting in a low electronegativity value.

Question 14

Based on your knowledge of electronegativities determine whether the bonds between the following pairs of atoms are ionic,polar covalent or nonpolar covalent:
A) F-F
B) Cs-Br
C) N-S

Accepted Answer

The answer of Based on your knowledge of electronegativities determine...

Question 15

Which element listed is the most electronegative?

Accepted Answer

Chlorine is the most electronegative element listed, as it is located towards the top right of the periodic table, which is where the most electronegative elements are found, excluding the noble gases.

Question 16

Draw the Lewis structure for CCl₄.What is the molecular geometry of this compound? Is the molecule polar or nonpolar?

Accepted Answer

The answer of Draw the Lewis structure for CCl₄.What is...

Question 17

A molecule that contains three identical polar bonds to the central atom will be

Accepted Answer

A molecule with three identical polar bonds arranged in a planar triangular (trigonal planar) geometry will have its bond polarities cancel out, resulting in a nonpolar molecule.

Question 18

A bond where the electrons are shared unequally is called a(an)________ bond.

Accepted Answer

A polar covalent bond is characterized by the unequal sharing of electrons between atoms, leading to a distribution of charge that is uneven across the molecule.

Question 19

Which of the following compounds is likely to have ionic bonds between the atoms?

Accepted Answer

Calcium (Ca) is a metal and chlorine (Cl) is a nonmetal. The electronegativity difference between them is high enough for them to form an ionic bond. The other compounds all contain nonmetals only and are therefore more likely to have covalent bonds.

Question 20

A section of the Periodic Table containing main group elements is shown.If the elements W,X,Y,and Z have electronegativity values of 1.0,2.0,2.5,and 3.5,respectively,which bond is the least polar?

Accepted Answer

The answer of A section of the Periodic Table containing...

Quiz 4: Molecular Compounds

The bond angle in the molecule H₂S is because the .

Which of the following molecules has a CCH bond angle of 180°?

According to VSEPR theory,a molecule with three charge clouds including one lone pair would have a ________ shape.

A section of the Periodic Table containing main group elements is shown.If the elements W,X,Y,and Z have electronegativity values of 1.0,2.0,2.5,and 3.5,respectively,which bond is ionic?

Explain how it is possible for CCl₄ to have polar bonds but be a non-polar molecule.A diagram may be helpful in your answer,but it must be explained.

A bond where the electrons are shared equally is called a(an) ________ bond.

Consider a bent molecule,such as H₂Se,in which the central atom has two lone pairs of electrons.The electronegativities of H and Se are 2.1 and 2.4,respectively.Based on these values and on consideration of molecular geometry,the H-Se bond can be considered almost and the molecule is .

What is the systematic name of ICl₃?

The carbon dioxide molecule is linear.The electronegativities of C and O are 2.5 and 3.5,respectively.Based on these values and on consideration of molecular geometry,the C-O bond is and the molecule is .

Consider the molecule SiCl₄.The electronegativity values for Si and Cl are 1.8 and 3.0,respectively.Based on these values and on consideration of molecular geometry,the Si-Cl bond is and the molecule is .

The water molecule has a geometry because its central atom has bonds and lone pairs of electrons.

A section of the Periodic Table containing main group elements is shown.Which bond would be least polar?

Which element listed is the least electronegative?

Based on your knowledge of electronegativities determine whether the bonds between the following pairs of atoms are ionic,polar covalent or nonpolar covalent: A) F-F B) Cs-Br C) N-S

Which element listed is the most electronegative?

Draw the Lewis structure for CCl₄.What is the molecular geometry of this compound? Is the molecule polar or nonpolar?

A molecule that contains three identical polar bonds to the central atom will be

A bond where the electrons are shared unequally is called a(an) ________ bond.

Which of the following compounds is likely to have ionic bonds between the atoms?

A section of the Periodic Table containing main group elements is shown.If the elements W,X,Y,and Z have electronegativity values of 1.0,2.0,2.5,and 3.5,respectively,which bond is the least polar?

Quiz 4: Molecular Compounds

The bond angle in the molecule H2S is ________ because the ________.

Which of the following molecules has a CCH bond angle of 180°?

According to VSEPR theory,a molecule with three charge clouds including one lone pair would have a ________ shape.

A section of the Periodic Table containing main group elements is shown.If the elements W,X,Y,and Z have electronegativity values of 1.0,2.0,2.5,and 3.5,respectively,which bond is ionic?

Explain how it is possible for CCl4 to have polar bonds but be a non-polar molecule.A diagram may be helpful in your answer,but it must be explained.

A bond where the electrons are shared equally is called a(an) ________ bond.

What is the systematic name of ICl3?

The carbon dioxide molecule is linear.The electronegativities of C and O are 2.5 and 3.5,respectively.Based on these values and on consideration of molecular geometry,the C-O bond is ________ and the molecule is ________.

Consider the molecule SiCl4.The electronegativity values for Si and Cl are 1.8 and 3.0,respectively.Based on these values and on consideration of molecular geometry,the Si-Cl bond is ________ and the molecule is ________.

The water molecule has a ________ geometry because its central atom has ________ bonds and ________ lone pairs of electrons.

A section of the Periodic Table containing main group elements is shown.Which bond would be least polar?

Which element listed is the least electronegative?

Based on your knowledge of electronegativities determine whether the bonds between the following pairs of atoms are ionic,polar covalent or nonpolar covalent: A) F-F B) Cs-Br C) N-S

Which element listed is the most electronegative?

Draw the Lewis structure for CCl4.What is the molecular geometry of this compound? Is the molecule polar or nonpolar?

A molecule that contains three identical polar bonds to the central atom will be

A bond where the electrons are shared unequally is called a(an) ________ bond.

Which of the following compounds is likely to have ionic bonds between the atoms?

A section of the Periodic Table containing main group elements is shown.If the elements W,X,Y,and Z have electronegativity values of 1.0,2.0,2.5,and 3.5,respectively,which bond is the least polar?

The bond angle in the molecule H₂S is because the .

Explain how it is possible for CCl₄ to have polar bonds but be a non-polar molecule.A diagram may be helpful in your answer,but it must be explained.

What is the systematic name of ICl₃?

The carbon dioxide molecule is linear.The electronegativities of C and O are 2.5 and 3.5,respectively.Based on these values and on consideration of molecular geometry,the C-O bond is and the molecule is .

Consider the molecule SiCl₄.The electronegativity values for Si and Cl are 1.8 and 3.0,respectively.Based on these values and on consideration of molecular geometry,the Si-Cl bond is and the molecule is .

The water molecule has a geometry because its central atom has bonds and lone pairs of electrons.

Draw the Lewis structure for CCl₄.What is the molecular geometry of this compound? Is the molecule polar or nonpolar?