Chemistry Review – Magnesium & Nitrogen Case Study
Dr. Slotsky
1) Magnesium metal is ground into a fine powder. This is a
a) Chemical change b) Physical change
c) Both d) Neither
2) Magnesium metal burns brightly under an atmosphere of Nitrogen. This is a
a) Chemical change b) Physical change
c) Both d) Neither
3) Magnesium burning in Nitrogen produces Magnesium Nitride and heat.
a) Both products are matter b) Both products are energy
c) Only Heat is matter d) Only Magnesium Nitride is
matter
4) Write the symbol for Magnesium ______
5) Write the symbol for Nitrogen (remember ClurBr!) ______
6) The electron configuration for Magnesium is
a) 1s2 2s2 2p8 b) 1s2 2s2 2p6 3s2
c) 1s2 2s2 2p6 d) 1s2 2s2 2p6 3s2 3p2
7) The electron configuration for Nitrogen is
a) 1s2 2s2 2p8 b) 1s2 2s2 2p6
c) 1s2 2s2 2p3 d) 1s2 2s2 2p6 3s2 3p5
8) Write the symbol for Magnesium ion (with charge) ______
This is a cation OR anion
Magnesium gains OR loses ____ electrons to form this ion
9) Write the symbol for Nitride ion (with charge) ______
This is a cation OR anion
Nitrogen gains OR loses ____ electrons to form this ion
10) The electron configuration for Magnesium Ion is
a) 1s2 2s2 2p8 b) 1s2 2s2 2p6 3s2
c) 1s2 2s2 2p6 d) 1s2 2s2 2p6 3s2 3p2
11) The electron configuration for Nitride Ion is
a) 1s2 2s2 2p8 b) 1s2 2s2 2p6
c) 1s2 2s2 2p5 d) 1s2 2s2 2p6 3s2 3p2
12) The formula of Magnesium Nitride is
a) MgN b) Mg2N3
c) MgN3 d) Mg3N2
13) The molar mass of Magnesium Nitride is ______
14) The mass of 3 moles of Magnesium Nitride is ______
15) Write a balanced equation for the reaction of Magnesium with Nitrogen to form Magnesium Nitride.
______
16) The reaction in [15] is
a) Synthesis b) Decomposition c) Single displacement
d) Double displacement e) Combustion
17) Magnesium Nitride reacts with water to form ammonia (NH3) and magnesium hydroxide. Fill in the subscripts and coefficients to write a correct, balanced equation:
___Mg_N_ + __H2O ® __Mg(OH)2 + __NH3
18) The reaction in [17] is
a) Synthesis b) Decomposition c) Single displacement
d) Double displacement e) Combustion
19) A piece of magnesium metal has a mass of 17 grams and a volume of 10 cm3. The density of magnesium is: ______g/cm3
20) Water has a density of 1 g/cm3. Magnesium metal will float OR sink?
21) Which is more electronegative, Magnesium or Nitrogen? Ref Table 6 p. 194 (you will be given a similar table with the Final Exam)
a) Magnesium b) Nitrogen c) Both have identical electronegativities
22) Use Figure 3 on p. 195 to classify the chemical bonds in Magnesium Nitride
a) Ionic b) Polar Covalent
c) Nonpolar covalent d) Metallic
23) Magnesium atoms have ____ protons and ___ neutrons in their nucleus
24) Classify Magnesium and Nitrogen
a) Magnesium is an alkaline earth metal, Nitrogen is a nonmetal
b) Both Magnesium and Nitrogen are nonmetals
c) Nitrogen is a halogen, while Magnesium is a noble gas
d) Magnesium is a transition metal, Nitrogen is a halogen
25) The compound C4H8 is
a) Butane b) Butene
c) Propyne d) Propane
26) The molar mass of hexane is ______
27) Hexane is bound together by covalent single bonds. A single bond is when atoms share ____ electrons.
28) Hexane takes the shape of its container, but maintains a constant volume. Therefore it is a
a) Solid b) Liquid
c) Gas d) Plasma
29) Nitrogen takes on both the shape and the volume of its container. Therefore it is a
a) Solid b) Liquid
c) Gas d) Plasma