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Chemical Bonds
Ionic Bonding
Covalent Bonding
Ionic Bonding
Covalent Bonding
100
Name the group that contains three elements with stable electron configurations?
What is the noble gasses
100
Which of the following is a typical property of an ionic compound? a. low melting point b. poor conductor of electric current when melted c. tendency to shatter when struck d. all of the above
What is tendency to shatter when struck
100
You see a structural formula in which the symbols for elements are connected by a long dash. You can assume that the chemical bonds in the compound are
What is a covalent bond
100
In an electron dot diagram, each dot represents a(an)
What is valence electron
100
If there are two long dashes between two atoms in a structural formula, molecules of the compound contain a(an) ____________________ bond.
What is double covalent
200
Typically, atoms gain or lose electrons to achieve
What is stable electronic configuaration
200
Which of the following statements correctly describes the substance with the formula KI? a. Molecules of potassium iodide contain one atom of potassium and one atom of iodine. b. There is a one-to-one ratio of potassium ions to iodide ions. c. Potassium iodide is a molecular compound. d. Potassium iodide is a polyatomic ion.
What is a one-to-one ratio of potassium ions to iodide ions.
200
In a polar covalent bond, a. electrons are shared equally between atoms. b. a cation is bonded to an anion. c. electrons are transferred between atoms. d. electrons are not shared equally between atoms.
What is electrons are not shared equally between atoms
200
In an ionic compound, the attractions between cations and ____________________ hold the compound together.
What is anions
200
The chemical formula for calcium chloride, CaCl2, shows that the compound contains two ____________________ ions for every ____________________ ion.
What is chloride ions for every one calcium ion
300
In an electron dot diagram, the symbol for an element is used to represent
What is nucleus and all non-valence electrons
300
In the compound MgCl2, the subscript 2 indicates that
What is for each magnesium ion there are two chloride ions
300
The water molecule H2O is polar because it contains two polar single bonds and its molecule has a
What is bent shape
300
You are given the melting points of three unknown substances and are asked to predict which one is an ionic compound. You would select the compound with the ____________________ melting point.
What is highest
300
When there are only two atoms of different elements in a molecule it is a ____________
What is polar covalent molecule
400
Ionization energies tend to
What is increase from left to right across a period
400
Which statement best describes the properties of sodium chloride? a. Sodium chloride is a malleable solid. b. Solid sodium chloride is a good conductor of electric current. c. Sodium chloride has a low melting point. d. Liquid sodium chloride is a good conductor of electric current.
What is liquid sodium chloride is a good conductor of electric current
400
Water has a higher boiling point than expected because
What is the strong attractions between polar water molecules.
400
The ions in solid sodium chloride are arranged in a structure called a(an) ____________________ lattice
What is crystal
400
In the binary ionic compound potassium bromide, KBr, the element that forms cations is ____________________.
What is K potassium
500
JACKPOT!!!! IF YOU ANSWER CORRECTLY YOU GET DOUBLE THE POINTS!!! Which of the following compounds does NOT contain molecules? H20, CO2, H2, NACl
What is NACl
500
When two atoms of the same nonmetal react, they often form a(an)
What is a di-atomic molecule
500
JACKPOT!!!! IF YOU ANSWER CORRECTLY YOU GET DOUBLE THE POINTS Because water molecules are polar and carbon dioxide molecules are nonpolar, a. water has a lower boiling point than carbon dioxide does. b. attractions between water molecules are weaker than attractions between carbon dioxide molecules. c. carbon dioxide cannot exist as a solid. d. water has a higher boiling point than carbon dioxide does.
What is water has a higher boiling point than carbon dioxide does.
500
KBr is the formula for an __________compound. The fact that neither symbol is followed by a subscript means that there is a(an) one to one ratio of ions in the compound.
What is ionic
500
Two factors that determine whether a molecule is polar are the types of atoms in the molecule and the ____________________ of the molecule.
What is shape