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What is the name given to the electrons in the highest occupied energy level of an atom?
What is the formula of the ion formed when phosphorus achieves a noble gas electron configuration?
What is the net charge of the ionic compound CaF2?
0 because the charge of Ca is 2+ and the charge of F is -1 but since it is F2, the charge is -2. 2+-2 = 0
Which of the following is true about an ionic compound?
All of the above (it is a salt, it is held together by ionic bonds, and it is composed of anions and cations.)
How many valence electrons are transferred from the nitrogen atom to potassium in the formation of the compound potassium nitride?
How many valence electrons are transferred from the calcium atom to iodine in the formation of the compound calcium iodide?
Alloys are commonly used in manufacturing. Which of the following is NOT a reason to use an alloy instead of a pure metal?
Cast iron is more brittle than pure iron
Which of the following pairs of elements is most likely to form an ionic compound?
Magnesium and fluorin
Which of the following is NOT a characteristic of most ionic compounds?
they have low melting points
What characteristic of metals makes them good electrical conductors?
they have mobile valence electrons
what is shown by the structural formula of a molecule or polyatomic ion?
the arrangement of bonded atoms
How do atoms achieve noble-gas electron configurations in single covalent bonds?
Two atoms share two electrons
Which of the following is the name given to the pairs of valence electrons that do not participate in bonding in diatomic oxygen molecules?
Once formed, how are coordinate covalent bonds different from other covalent bonds?
There is no difference
When H+ forms a bond with H2O to form hydronium ion H3O+, this bond is called a coordinate covalent bond because...
both bonding electrons come from the oxygen atom
What causes hydrogen bonding?
bonding of a covalently bonded hydrogen atom with an unshared electron pair
Why is hydrogen bonding only possible with hydrogen?
Hydrogen's nucleus is electron deficient when it bonds with an electronegative atoms.
When placed between oppositely charged metal plates, the region of a water molecule attracted to the negative plate is the...
hydrogen region of the atom
The octet rule states that, in chemical compounds, atoms tend to have...
the electron configuration of a noble gas
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