Chapter 6-7 Covalent Bonding Flashcards
(40 cards)
The normally weak forces of attraction that exist between molecules.
Intermolecular forces
What is the formula for the compound carbon tetraiodide?
CI4
States that chemical compounds tend to form so that each atom, by gaining, losing, or sharing electrons, has 8 valence electrons.
Octet rule
The energy required to break a chemical bond and form neutral, isolated atoms.
Bond (dissociation) energy
A molecule that has a partial positive end and a partial negative end.
A dipole

A particularly strong dipole-dipole interaction that results from the attraction between a hydrogen atom bonded to fluorine, oxygen, or nitrogen and another F, O, or N atom

Hydrogen bonding
Indicates the relative numbers of atoms of each kind in a chemical compound by using atomic symbols and numerical subscripts.
Chemical formula
Draw the Lewis structure and predict the molecular for geometry for the compound SeF6.

Intermolecular attractive force that results from the constant motion of electrons and the creation of instantaneous dipoles

London (Dispersion) forces
Draw the Lewis structure for the azide ion, N3-1. What is the predicted shape of the ion?

A covalent bond in which the bonding electrons are shared equally by the bonded atoms, resulting in a balanced distribution of electrical charge. The electronegativity difference between the atoms is between 0 and 0.3.
Non-polar covalent bond

Uranium(VI) fluoride is a compound used in the uranium enrichment process that produces fuel for nuclear reactors and nuclear weapons. Calculate the percent composition to one decimal place for each element.

Refers to bonding in molecules or ions that cannot be correctly represented by a single Lewis structure.

Resonance structures
What is the name of the compound SO3?
Sulfur trioxide
What is the formula for the compound dinitrogen trioxide?
N2O3
What is the name of the compound ICl3?
Iodine trichloride
What is the result of more electrons in an atom or molecule on London forces?
More electrons result in stronger London forces. This is reflected in higher melting and boiling points.
Tetracycline is an antibiotic used in the treatment of acne and rosacea. The compound is 59.46% carbon, 5.44% hydrogen, 6.30% nitrogen, and 28.80% oxygen. Calculate the empirical formula of this compound.
In a separate experiment, the molecular mass of tetracycline was determined to be 444.432u. What is its molecular formula?

A certain compound consists only of sulfur and nitrogen. The mass composition for this compound was found to be 69.6% sulfur and the remainder nitrogen. What is the empirical formula of this compound?
If the molecular mass of the compound was found to be 184.32u, what is its molecular formula?

When taking x-rays of the upper gastrointestinal tract, a patient is given a barium swallow as a contrast medium. The suspension of barium sulfate coats the upper GI tract with barium, enhancing its visibility on the x-ray. What is the mass composition of each element in barium sulfate, to two decimal places?

These elements can break the octet rule by having less than an octet when acting as the central atom in a molecule.
The elements of groups IIA and IIIA, particularly beryllium, boron, and aluminum.

A chemical compound whose simplest units are molecules. Generally does not contain a metal.
A molecular compound.
A covalent bond in which three pairs of electrons are shared between two atoms.
Triple bond

A neutral group of atoms that are held together by covalent bonds.
A molecule









