Bonding


True / False
If the statement is True, write True If the statement is False correct the underlined word so it reads true.


1. The elements of Group 15 (VA) of the periodic table have 4 valence electrons.
 


2.
Metallic elements tend to have low electronegativity values.


3.
A nitrogen molecule, N2, has two pairs of shared electrons and two pairs of unshared electrons.


4.
A molecule shows resonance if it has multiple correct Lewis structures.


Short Answer

5.
The number of lone (unbonded) pairs of electrons in H2O is


6.
Which of the following is the most electronegative? Li, K, F, Te


7.
Which of the following has bonding that is ionic?
A.
Cl2
B.
CaF2
C.
H2O
D.
CCl4


8.
Classify the bond between these pairs of elements as principally ionic or principally covalent: sodium and nitrogen


9.
Which atom will form an ionic bond with a O atom?
A.
N
B.
Li
C.
O
D.
C


10.
The bond between the atoms in HF is a(n)
A.
polar covalent bond
B.
nonpolar covalent bond
C.
ionic bond
D.
double bond


11.
Which of the following contains a nonpolar covalent bond?
A.
HCl
B.
Br2
C.
Cl2O
D.
NH3


12.
Draw the Lewis structure for an ammonium ion, NH


13.
Draw a Lewis structure for the nitrite ion, NO
   


14.
HNO2 is known as nitrous acid; draw the most reasonable Lewis structure for this molecule


15.
Dihydrogen trioxide, H2O3, is a highly unstable and volatile compound which is related to hydrogen peroxide. Draw its Lewis structure


16.
Which is larger, a magnesium atom or ion?


17.
 
 Predict the type of bond that would be formed between O and F


18.
In the name iron (II) oxide, what does the Roman numeral II mean?


19. The name for Pb(NO2)2 is


20. The formula for diphosphorus pentachloride is


21. What is the formula for chromium (III) chloride?


22. Which formula does not represent a correct compound of Be?
A.
BeCl2
B.
Be2S
C.
BeO
D.
Be3N2

 
Define the following words

23.
polyatomic ion
24.
ionic bond
25.
cation
26.
valence
27.
polar covalent bond
28.
nonpolar covalent bond
29.
covalent bond
30.
anion

Short Answer
31.
When one electron is removed from an atom of Na, it has ten left. Neon atoms also have ten electrons. Why is more energy required to remove the second electron from Na than to remove the first from Ne?


32. The number of valence electrons in a sulfite ion is __


33.
How many electrons must be gained or lost for a sulfur atom to achieve a noble gas electron structure?


34.
Rank these elements according to the radii of their atoms, from smallest to largest: Ca, Li, F


35. Identify this element: Element X reacts with magnesium to form the compound MgX and is in the second period on the periodic table


36. Identify this element: Element Y reacts with nitrogen to form the compound Y3N and has the lowest ionization energy of any fifth period element on the periodic table.