Chem Test Chptr 6
What is a metallic bond?
A physical bond where a negatively charged metal ions are held together within a fluid of loosely held electrons
A chemical bond where negatively charged metal ions are held together within a fluid of loosely held electrons
A chemical bond in which positively charged metal ions are held together within a fluid of loosely held electrons
A chemical bond where positively charged metal ions are held together within a fluid of tightly held neutrons
What are the two other terms referring to "fluid of electrons?"
Sea of electrons
Electron fluid
Ocean of electrons
Delocalized electrons
Why do metals conduct heat and electricity?
Because free electrons easily vibrate
Their electrons can easily move in response to increase in heat
Their electrons respond to the opaque and shiny nature of metal
What is an alloy?
A metal mixture that is opaque and shiny
A mixture of two or more metallic elements
A mixture of two metals
A mettaloid mixture
What is a metal called when found in pure form in nature?
Natural metal
Original metal
Native metal
Ionic metal
High grade ores contain ______ concentrations of compounds from which metals can be extracted.
High
Low
Ores are.....
Made in laboratories
Obtained from rocks in nature
The bond formed by a sharing of electrons is a(n) _______ bond
Ionic
Covalent
A compound of covalently bonded atoms is a(n) ______ compound
Covalent
Ionic
A(n)________ is any group of atoms held together by covalent bonds
Ion
Molecule
Atom
The smallest part of a compound....?
Atom
Molecule
Cell
Covalent bonds tend to form between atoms which usually ______ electrons.
Lose
Gain
Covalent bonds that gain electrons are usually formed between two _______.
Metals
Nonmetals
All atoms covalently bonded together, the entire crystal is considered what?
Micromolecule
Macromolecule
Single Molecule
In the VSEPR model, electron pairs move __________________ from the other electron pairs
As far away as possible
As close as possible
What does VSEPR stand for?
Valence-Shell- Electric-Power
Valence- Shell- Electron- Pair
What is the VSEPR theory model with one in the middle and three on top, and sides that lays flat.
Triangular Pyramidal
Triangular Planar
Linear
Tetrahedral
What is the VSEPR theory model that stands like a camera tripod?
Tetrahedral
Triangular Planar
Triangular Pyramidal
Bent
In a covalent bond between like atoms, the electron cloud will be shared _______.
Evenly
Unevenly
Between two different atoms the electron cloud is being shared ________
Evenly
Unevenly
When electrons between atoms in a covalent bond are shared equally the bond is......
Polar
Nonpolar
When electrons between atoms in a covalent bond are shared unequally the bond is......
Nonpolar
Polar
When electrons are shared unequally, the structure which has separation of charges is what?
Polar
Dipole
Nonpolar
When all bonds in molecule are non polar, the molecule as a whole is _______-
Polar
Nonpolar
When a molecule made up of two polar atoms, the molecule as a whole is ________.
Polar
Nonpolar
When the difference in electronegativities is net zero, the bond is mainly
Polar
Nonpolar
Substances made up of polar molecules tend to have a ______ boiling point
High
Low
Why do substances with polar molecules have a high boiling point?
They have strong attractions for each other
They have weak attractions for each other
They have no reaction to each other
Substances made up of nonpolar molecules have a _____ boiling point
Low
High
Substances made up of nonpolar molecules have low boiling points because _________-
Their molecules have strong attraction to each other
Their molecules have weak attraction to each other
Their molecules have no attraction to each other
Term for a molecule where electrons are not evenly distributed _______
Molecule
Nonpolar
Dipole
Mixture
Dipole-Dipole attractions are attractions between two _______ molecules
Nonpolar
Polar
What is a solution?
A heterogeneous mixture consisting of a double phase
A homogeneous mixture consisting of a double phase
A homogeneous mixture consisting of a single phase
A heterogeneous mixture consisting of a single phase
Example of a liquid solution...
Gemstones
Air
Sugar Water
Water
Example of a solid solution
Air
Water
Gemstones
Rock
Example of a gaseous solution
Nitrogen
Air
Water
Sugar Water
What is an alloy?
A mixture of different nonmetals
A mixture of different metals
A mixture of similar metals
Example of an Alloy
Stainless Steel
Glass
Gold
Rock
What is a solvent?
Smallest amount of a compound
Dissolves in Solute
Largest amount of compound
What is a solute?
Dissolves in Solvent
Largest amount of compound
Smallest amount of molecule
What is a saturated solution?
When no more solvent can be dissolved
When no more solute can be dissolved
When no more molecules can be added
What is an unsaturated solution?
Has reached the limit of solute dissolved
Has reached the limit of solvent dissolved
Has not reached the limit of solute dissolved
Has not reached the limit of solvent dissolved
Supersaturated solution?
More solvent than normal
More solute than normal
Less solvent than normal
Less solute than normal
The quantity of a solute dissolved in a solution is called ________
Molecule
Mixture
Solvent
Solute
Concentration
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