Chemistry Test 7 Flashcards
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Draw the Lewis Dot diagram for Ammonia (NH₃)
. H
|
H —— N —– H
. .
Write the formula unit for Calcium (Ca) and Phosphorus (P)
Ca₃P₂
Draw the Lewis Dot diagram for PCl₃
.. .. ..
:Cl ——- P ——- Cl:
.. | ..
:Cl:
..
Write the formula unit for Potassium (K) and Nitrogen (N)
K₃N
What type of bond is I₂
covalent bond
What type of bond is Cu
Metallic Bond
What type of bond is Fe₃Al
Metallic Bond
What type of bond has attraction between oppositely charged ions?
Ionic Bond
What type of bond shares one or more electrons?
Covalent Bond
What type of bond does the electron-sea theory belong to?
Metallic Bonds
Covalent bonds create
Molecules
Ionic bonds create
Formula Units
Bonds between two nonmetals.
Covalent bonds
Bonds between a nonmental and a metal.
Ionic Bonds
Bonds between metals
Metallic Bonds
Diatomic molecules (naturally occurring.)
hydrogen (H2), nitrogen (N2), oxygen (O2), fluorine (F2), chlorine (Cl2), bromine (Br2), and iodine (I2)
(T or F) Diatomic elements such as I2 exhibit ionic bonding.
False
(T or F) There are four unshared pairs of electrons in a water molecule.
False
(T or F) The greater the difference in electronegativity between two elements, the greater the polarity of the resulting bond.
True
Electrons are shared unevenly between two atoms due to a difference in their electronegativity.
Polar Compound
A type of bond that occurs when two atoms share electrons equally.
A nonpolar compound
(T or F) It is improper to refer to sodium chloride as a molecule
True
(T or F) Ionic compounds have considerably lower boiling points than polar covalent compounds have.
False
Chemical bonds between atoms involve the rearranging of __________ to maximize stability.
Electrons
What type of bond would you expect in a compound of oxygen and sodium?
Ionic
The electron-sea theory accounts for all the following characteristics of metals such as.
Luster, conductivity, and ductility
An orderly arrangement of ions in a 3D pattern within a compound is called a(n) _________.
Crystal Lattice
Why do atoms bond?
To gain stability and lose energy.
A bond that forms between two or more atoms that have high electron affinities is most likely a(n) ____________.
Covalent Bond
Examples of nonpolar covalent molecule.
F2, O2, Br2
The polarity of a bond depends on the difference in the atom’s ____________.
Electronegativities
To achieve the octet when combining with potassium, would an atom of a Group 16 element be expected to lose, gain, or share electrons?
Gain
The attraction between opposite electrical charges; holds covalent bonds together.
Electrostatic Force
Most metals are likely to freely share electrons when bonding with each other because they have ______________.
Low electronegativities
What is associated with ionic compounds?
Opposite charges attracting each other, hard, brittle solids, and formula units.
Compounds formed by the attraction between oppositely charged ions are the result of _______.
Ionic Bonds
The electron shared in a covalent bond are called a(n) _____________.
Bonding Pair
Although they are made of two or more atoms, _______ often act as single charged particles in chemical reactions and solutions.
Polyatomic ions
A mixture of atoms of a metal with another element where the mixture has metallic properties is called a(n) _____________.
Alloy
In general, how do the stability and energy of bonded atoms compare with that of unbonded atoms?
Stability is greater and energy is lower for bonded atoms.
How do intermolecular forces affect the melting point of a compound?
Stronger intermolecular forces within a compound increase the melting point.
