Question 1

Group 1A elements are less reactive than group 2A elements.

Accepted Answer

A) True 
 B)False  False

Question 2

Predict the products for the reaction of the following set of reactants. BaO(s) + CO2(g) →

Accepted Answer

A)   BaCO3(s) 
B)   Ba(s)  + CO(g)  + O2(g) 
C)   BaO2(s)  + CO(g) 
D)   Ba2CO3(s) 
E)   BaC2(s)  + O2(g)  A

Question 3

Predict the products formed from the following set of reactants. FeSe(s) + HCl(aq) →

Accepted Answer

A)   Se(s)  + FeCl2(aq) 
B)   SeCl2(s)  + Fe(s)  + H2(g) 
C)   FeH2(s)  + SeCl2(l) 
D)   H2Se(g)  + Fe(s)  + Cl2(g) 
E)   H2Se(g)  + FeCl2(aq)  E

Question 4

Select the element with the highest first ionization energy.

Accepted Answer

A)   Mg
B)   Ca
C)   Ba
D)   Ra
E)   K

Question 5

The acidity of oxides of main group elements increases across a period from left to right.

Accepted Answer

A) True 
 B)False

Question 6

Predict the products for the reaction of the following set of reactants. Mg(s) + Cl2(g) →

Accepted Answer

A)   MgCl(s) 
B)   MgCl2(s) 
C)   MgCl(l) 
D)   MgCl2(l) 
E)   MgCl2(aq)

Question 7

According to the phase diagram of carbon, what pressure and temperature conditions, if any, are needed in order for diamond to be the stable phase?

Accepted Answer

A)   low pressure, low temperature
B)   low pressure, high temperature
C)   high pressure, low temperature
D)   high pressure, high temperature
E)   Actually, diamond is not stable under any conditions.

Question 8

Predict the products for the following set of reactants. K2O(s) + H2O(l) →

Accepted Answer

A)   K+(aq)  + OH-(aq)  + H2(g) 
B)   K+(aq)  + OH-(aq) 
C)   K+(aq)  + H2(g)  + O2(g) 
D)   KH(s)  + O2(g) 
E)   K+(aq)  + OH-(aq)  + H2O2(aq)

Question 9

Hydrogen fluoride is used

Accepted Answer

A)   in the manufacture of steel.
B)   in the synthesis of cryolite for aluminum production.
C)   as an oxidizing agent.
D)   as a disinfectant.
E)   as a mouthwash.

Question 10

Which of the following will have the highest boiling point?

Accepted Answer

A)   O2
B)   Cl2
C)   Br2
D)   I2
E)   Xe

Question 11

Predict the products for the reaction of the following set of reactants. MgCO3(s) + heat →

Accepted Answer

A)   Mg(s)  + CO(g) 
B)   Mg(s)  + CO2(g) 
C)   MgO(s)  + CO(g) 
D)   MgO(s)  + CO2(g) 
E)   no reaction

Question 12

Which of the following hydroxides will be the most basic?

Accepted Answer

A)   B(OH) 3
B)   Al(OH) 3
C)   Ga(OH) 3
D)   In(OH) 3
E)   TlOH

Question 13

Bromine will form compounds with each of the other elements in Period 4 of the periodic table. How does the type of bonding in the compounds change as one moves from potassium bromide to selenium bromide?

Accepted Answer

A)   ionic to polar covalent
B)   polar covalent to ionic
C)   polar covalent to non-polar covalent
D)   coordinate covalent to polar covalent
E)   None of these choices are correct.

Question 14

Boron has 3 valence electrons. Which of the following processes is involved in boron's achieving a complete outer shell?

Accepted Answer

A)   formation of a B3+ cation
B)   formation of bridge bonds
C)   formation of 3+ cation 
B)   formation of bridge bonds 
C)   formation of   -bonds using its d-orbitals 
D)   formation of   -bonds using sp3-orbitals 
E)   None of these choices are correct." class="answers-bank-image d-inline" rel="preload" > -bonds using its d-orbitals
D)   formation of 3+ cation 
B)   formation of bridge bonds 
C)   formation of   -bonds using its d-orbitals 
D)   formation of   -bonds using sp3-orbitals 
E)   None of these choices are correct." class="answers-bank-image d-inline" rel="preload" > -bonds using sp3-orbitals
E)   None of these choices are correct.

Question 15

Which of the following oxides is most basic?

Accepted Answer

A)   As2O3
B)   P4O10
C)   Sb2O3
D)   Sb2O5
E)   NO2

Question 16

Comparing neon with xenon, one would expect neon to have a ________ density at STP, and a ________ normal boiling point than xenon.

Accepted Answer

A)   higher, higher
B)   higher, lower
C)   lower, higher
D)   lower, lower
E)   Since they are both noble gases, their densities and boiling points will be very similar.

Question 17

Oxides of group 1A (1) and 2A (2) elements are strongly acidic.

Accepted Answer

A) True 
 B)False

Question 18

Although the periodic table is organized according to the atomic numbers of the elements, chemists are more interested in the arrangement of the electrons for their studies. Which of the following statements about the electron configurations and their quantum numbers is correct?

Accepted Answer

A)   The size of an atom is associated with the angular momentum quantum number.
B)   The valence electrons of atoms in a particular group have the same principal and angular momentum quantum numbers.
C)   The valence electrons of atoms in a particular group have the same angular momentum quantum number but have different principal quantum numbers.
D)   Quantum numbers for the electrons tell us little about the relative energies of the electrons.
E)   None of these choices are correct.

Question 19

The acidity of oxides of main group elements increases down a group, from top to bottom.

Accepted Answer

A) True 
 B)False

Question 20

Which of the alkali metals has the highest melting point?

Accepted Answer

A)   Li
B)   Na
C)   K
D)   Rb
E)   Cs

Exam 14: Periodic Patterns in the Main-Group Elements

Group 1A elements are less reactive than group 2A elements.

Predict the products for the reaction of the following set of reactants. BaO(s) + CO₂(g) →

Predict the products formed from the following set of reactants. FeSe(s) + HCl(aq) →

Select the element with the highest first ionization energy.

The acidity of oxides of main group elements increases across a period from left to right.

Predict the products for the reaction of the following set of reactants. Mg(s) + Cl₂(g) →

According to the phase diagram of carbon, what pressure and temperature conditions, if any, are needed in order for diamond to be the stable phase?

Predict the products for the following set of reactants. K₂O(s) + H₂O(l) →

Hydrogen fluoride is used

Which of the following will have the highest boiling point?

Predict the products for the reaction of the following set of reactants. MgCO₃(s) + heat →

Which of the following hydroxides will be the most basic?

Bromine will form compounds with each of the other elements in Period 4 of the periodic table. How does the type of bonding in the compounds change as one moves from potassium bromide to selenium bromide?

Boron has 3 valence electrons. Which of the following processes is involved in boron's achieving a complete outer shell?

Which of the following oxides is most basic?

Comparing neon with xenon, one would expect neon to have a density at STP, and a normal boiling point than xenon.

Oxides of group 1A (1) and 2A (2) elements are strongly acidic.

Although the periodic table is organized according to the atomic numbers of the elements, chemists are more interested in the arrangement of the electrons for their studies. Which of the following statements about the electron configurations and their quantum numbers is correct?

The acidity of oxides of main group elements increases down a group, from top to bottom.

Which of the alkali metals has the highest melting point?