Chemical Bonding Quiz Flashcards

Questions and Answers

What determines the number of covalent bonds formed by an atom?

Electrons in the outer valence shell of the atom (correct)

Electrons in each orbital of the atom

Valence shells in the atom

Orbitals found in the atom

What is the correct molecular formula for caffeine?

C8H10N4O2 (correct)

C3H9N4O2

C3H10N4O2

C8H9N4O2

A covalent chemical bond is one in which:

Outer shell electrons are shared by two atoms so as to satisfactorily fill the outer electron shells of both. (correct)

Outer shell electrons of one atom are transferred to the inner electron shells of another atom.

Protons or neutrons are shared by two atoms so as to satisfy the requirements of both.

Electrons are removed from one atom and transferred to another atom so that the two atoms become oppositely charged

A shared pair of electrons is called a: _________.

covalent bond Signup and view all the answers

Will O2 form a polar covalent bond?

No, because both atoms are equally electronegative. Signup and view all the answers

Will a polar covalent bond form between the two nitrogen atoms in nitrogen gas (N2)?

No, because both atoms are equally electronegative. Signup and view all the answers

What do the four elements most abundant in life - carbon, oxygen, hydrogen and nitrogen - have in common?

They all have unpaired electrons in their valence shells. Signup and view all the answers

Table salt is composed of Na+ and Cl- to form NaCl. This type of bond is called: _____________.

ionic Signup and view all the answers

A double covalent bond is the sharing of a total of how many electrons?

4 Signup and view all the answers

Which bond is the weakest?

Hydrogen bonds Signup and view all the answers

Study Notes

Covalent Bonds

The number of covalent bonds formed by an atom is determined by the electrons in its outer valence shell.
A covalent bond is characterized by the sharing of outer shell electrons between two atoms to satisfy both their outer electron shell requirements.
A shared pair of electrons is referred to as a covalent bond.

Caffeine Molecular Formula

The correct molecular formula for caffeine is C8H10N4O2.

Polar and Non-Polar Bonds

O2 does not form a polar covalent bond because both oxygen atoms are equally electronegative.
In nitrogen gas (N2), a polar covalent bond will not form due to equal electronegativity between the two nitrogen atoms.

Abundant Elements in Life

The four most abundant elements in life—carbon, oxygen, hydrogen, and nitrogen—all have unpaired electrons in their valence shells.

Types of Chemical Bonds

Table salt (NaCl) is formed through ionic bonds, which result from the electrostatic attraction between Na+ and Cl- ions.
A double covalent bond involves the sharing of a total of four electrons.
Among covalent, hydrogen, and ionic bonds, hydrogen bonds are considered the weakest.

Additional Notes

Polar covalent bonds typically occur between atoms of differing electronegativities, causing an unequal sharing of electrons.
Ionic bonds arise from the complete transfer of electrons from one atom to another, resulting in charged ions.

Description

Test your knowledge of chemical bonding concepts with these flashcards. Explore topics such as covalent bonds and molecular formulas for compounds like caffeine. Perfect for students looking to enhance their understanding of chemistry.