CUSSA June 2018
Note: you can provide answers at the end
Identify the choice that best completes the statement or answers the question.
|____||1.||What is the name given to the electrons in the highest occupied energy level of an atom?|
|How does calcium obey the octet rule when reacting to form compounds?|
|a.||It gains electrons.|
|b.||It gives up electrons.|
|c.||It does not change its number of electrons.|
|____||3.||d.||Calcium does not obey the octet rule.|
|What is the charge on the strontium ion?||c.|
|How many electrons does barium have to give up to achieve a noble-gas electron configuration?|
|What is the formula of the ion formed when potassium achieves noble-gas electron configuration?|
|a.||K 2 ||c.||K 1 −|
|____||6.||b.||K ||d.||K 2 −|
|Which of the following ions has a pseudo-noble-gas electron configuration?|
|a.||Fe 2||c.||Cu |
|Which of the following elements does NOT form an ion with a charge of 1?|
|What is the charge on the cation in the ionic compound sodium sulfide?|
|Which of the following occurs in an ionic bond?|
|a.||Oppositely charged ions attract.|
|b.||Two atoms share two electrons.|
|c.||Two atoms share more than two electrons.|
|d.||Like-charged ions attract.|
____ 10. What is the net charge of the ionic compound calcium fluoride?
a. One atom completely loses two electrons to the other atom in the bond.
b. Two atoms share two pairs of electrons.
c. Two atoms share two electrons.
d. Two atoms share one electron.
covalent bond because ____.
a. both bonding electrons come from the oxygen atom
b. it forms an especially strong bond
c. the electrons are equally shared
d. the oxygen no longer has eight valence electrons
|____||28.||Which of the following atoms acquires the most negative charge in a covalent bond with hydrogen?|
|Which of the following covalent bonds is the most polar?|
|What causes hydrogen bonding?|
a. attraction between ions
b. motion of electrons
c. sharing of electron pairs
d. bonding of a covalently bonded hydrogen atom with an unshared electron pair
____ 31. Why is hydrogen bonding only possible with hydrogen?
a. Hydrogen’s nucleus is electron deficient when it bonds with an electronegative atom.
b. Hydrogen is the only atom that is the same size as an oxygen atom.
c. Hydrogen is the most electronegative element.
Hydrogen tends to form covalent bonds.