Atomic Structure and Properties
What is the charge on an oxide ion?
+2
+1
-2
-1
Considering their positions on the periodic table, which pair is most likely to form an ion with a +2 charge?
Sulfur (S)
Potassium (K)
Fluorine (F)
Magnesium (Mg)
What patterns could be observed when comparing the bonding in NaCl (sodium chloride) and MgO (magnesium oxide) that would explain differences in their physical properties?
MgO has lower electrical conductivity as solid compared to NaCl
NaCl has more flexible lattice structure than MgO, resulting in lower hardness
MgO has stronger ionic bonds than NaCl, leading to higher melting point
NaCl forms more polarizable molecules than MgO, implying greater solubility in water
What makes magnesium oxide a suitable material for furnace linings where high temperatures are common?
Incorrect answer number two yyyyyy
Magnesium oxide has high melting point due to strong electrostatic forces between Mg^2+and O^2−ions
Incorrect answer number three zzzzzz
Incorrect answer number one xxxxxx
Which of the following compounds would result from the combination of aluminum ions and sulfate ions?
Aluminum sulfate
Sulfur trioxide
Aluminum sulfide
Aluminum silicate
Which element is most likely to form an ionic bond with sodium?
Hydrogen (H)
Chlorine (Cl)
Nitrogen (N)
Carbon (C)
Which property of ionic compounds explains why table salt (sodium chloride) is able to conduct electricity when dissolved in water?
Ionic compounds have covalent bonds that can carry an electric charge when broken.
Ionic compounds share electrons evenly, creating a stable electrical network.
Ionic compounds have high melting points, which allows them to resist electrical currents.
Ionic compounds dissociate into ions in solution, allowing for the conduction of electricity.

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What type of solid structure would you expect from a substance that exhibits high electrical conductivity when molten but not when solid?
Molecular Solid
Ionic Solid
Metallic Solid
Network Covalent Solid
In an ionic compound formed between magnesium and chlorine, how many valence electrons does the magnesium atom lose to achieve a noble gas electron configuration?
2
3
No valence electrons are lost; they are shared.
1
Considering periodic trends and ionization energies, which alkaline earth metal would require the most energy when forming an MgX-type binary compound with halogen X?
Strontium (Sr)
Calcium (Ca)
Magnesium (Mg)
Beryllium (Be)