Chemical Bonds Test
least one metallic element
Alloy is a mixture that contains ____
ion
An _____ is an atom that has a net positive or negative electric charge.
stable electron configuration
Atoms gain or lose electrons to achieve what?
neon
By losing one valence electron, a sodium atom achieves the same electron configuration as an atom of ______
transfer of electrons
Formation of Ionic bonds involves _______
BeCl2
Formula for Beryllium (Be) and chlorine (CI)
harder and stronger
How does increasing amount of carbon in steel affect its properties?
D
In a polar covalent bond; A. electrons are shared equally, B. a cation is bonded to an anion, C. electrons are transferred between atoms, or D. electrons are not shared equally between atoms
nucleus and all non valence electron
In an electron dot diagram, the symbol for an element is used to represent what?
2 chlorine atoms for each barium atom
In the compound BaCl2 the subscript 2 indications what?
crystal lattice
Ions in solid sodium chloride are arranged in a structure called a(n)
A
Many metals can be drawn into thin wires without breaking due to A. cations are still surrounded by electrons when they shift their positions in the lattice, B. Metals generally have low melting points, C. when a metal is struck with a hammer, the positions of the anions do not change, or D. electrons have fixed positions in a metallic lattice
cations
Metal lattice _______ are surrounded by a pool of shared electrons
attraction between positively charged and negatively charged particles
Metallic bonding is similar to ionic bonding because______
alloy
Mixing magnesium and aluminum together produces an excellent lightweight material from which to make airplane parts. What is this type of mixture called?
2 oxygen atoms
Prefix of the second word in carbon dioxide means that its molecule contains _______
Its molecule has a bent shape
The water molecule H20 is polar because it contains two polar single bonds and ______________
Strong attraction between water molecules
Water has a higher boiling point that expected because of what?
Noble Gases
What group has a stable electron configuration?
transition metals
What group of elements are most likely to form more than one type of ions?
D
What phrase best describes a metallic bond; A. a bond formed by a metal, B. attraction between a metal anion and a shared pool of electrons, C. bond that forms between a metal and nonmetal, D. attraction between a metal cation and shared pool of electrons.
cation
When an atom loses an electron it forms what?
nonpolar covalent
When two fluorine atoms share a pair of electrons, the bond that forms is a(n)
B
Which of the following compounds does NOT contain molecules; A. H2, B. NaCl, C. CO2, or D. H20?
C
Which of the following is typical property of an ionic compound; A. low melting point, B. poor conductor of electric current when melted, C. tendency to shatter when struck, or D. all of the above?
D
Which of the following results when a magnesium atom transfers electrons to a chlorine atom A. each atom ends up with a less stable electron arrangement, B. magnesium atom becomes more stable, but chlorine atom becomes less stable, C.chlorine atom becomes more stable, but the magnesium becomes less stable, or D. Each atom ends up with a more stable electron arrangement
D
Which of these describes a property of sodium chloride; A. Sodium Chloride is a malleable solid, B. Solid sodium chloride forms a metallic lattice, C. Sodium chloride has a low melting point, or D. Sodium Chloride is a good conductor of electric current?
A
Which pair has the same electron configuration; A Cl- and Ar, B. Cl and Ar, C. Cl- and Ar-, or D. Cl+ and Ar.
C
Which statement about metals is true, A. metal lattice is extremely rigid, B. bonds within a metal lattice are weak, C. Electrons in a metal lattice are free to move, or D. Generally, metals have a low melting point?
C
Which type of solid is likely to be the best conductor of electric current, A. nonpolar covalent compound, B. polar covalent compound, C. metallic compound, D. all of these
