Chem Ch 6 Test Flashcards
Why do atoms form bonds with each other?
Lose energy
Gain stability
An atom becomes more stable by bonding with another atom if the resulting electron configuration is more like that of what group of elements?
Noble gases
When atoms form bonds with each other, what is being rearranged between the atoms so that stability can be achieved?
Valence electrons
What type of bond would you expect in a compound of oxygen and Chlorine?
Covalent
What type of bond would you expect in a compound of oxygen and Sodium?
Ionic
What type of bond would you expect in a compound of Nitrogen and Potassium?
Ionic
The measure of an atom’s ability to attract electrons to itself in a chemical bond is called
Electronegativity
The polarity of a bond depends on the difference in the atoms’
Electronegativity
Which of the following is a nonpolar covalent compound?
a. KCl
b. H2
c. KO
d. Cu
B
Which of the following values for EN would represent a bond that is mostly ionic?
a. 0.5
b. 1.9
c. 2.2
d. 2.8
D
Diatomic molecules
BrINClHOF
Bromine, Iodine, Nitrogen, Chlorine, Hydrogen, Oxygen, Fluorine
What do we call the attraction between opposite electrical charges?
Electrostatic force
If the atoms below formed a covalent compound, which is most likely to be the central atom?
a. helium c. chlorine
b. carbon d. sulfur
B
A dash in a Lewis structure represents __________ electron(s).
2
An orderly arrangement of ions in a three-dimensional pattern within a compound is called a(n)
Crystal lattice
Alloy
Mixture of 2 or more metals
Carry electrical current and thermal energy
Have luster
Malleable
Ductile
Ex: Wedding rings
What gives metal its luster electrical and heating conductive abilities?
The free electrons that freely move around
List the 3 properties of ionic compounds
Strong bonds
High melting points
Dense, brittle, hard
Good electron conductors if dissolved/molten
List the properties of covalent compounds
Low melting point (weak attractions between atoms)
Not dense/hard
Poor heat and electricity conductors
Which of the following molecules would you say has a double bond in it?
CO CO2 H2 H2O NaCl
CO2
The luster or shine seen on most metals is thought to be caused by the movement of
Electrons
In order to achieve an octet when combining with potassium, an atom of a Group 16 (6A) element would be expected to __________ electrons.
Gain
An orderly arrangement of ions in a three-dimensional pattern within a compound is called a(n)
Crystal lattice
The electron-sea theory accounts for all of the following characteristics of metals except
Brittleness
