Question 1

The sulfide ion, S2-,  is isoelectronic with which one of the following?

Accepted Answer

A) O2- 
B) F- 
C) Na+ 
D) Al3+ 
E) K+ 
A) O2- 
B) F- 
C) Na+ 
D) Al3+ 
E) K+

Question 2

Given the following melting point data, what is a reasonable estimate of the melting point of potassium?

Accepted Answer

The answer of Given the following melting point data, what...

Question 3

The successive ionization energies of a certain element are I1 = 577.9 kJ/mol, I2 = 1820 kJ/mol, I3= 2750 kJ/mol, I4 = 11,600 kJ/mol, and I5 = 14,800 kJ/mol. This pattern of ionization energies suggests that the unknown element is

Accepted Answer

A) K. 
B) Al. 
C) Cl. 
D) Se. 
E) Kr. 
A) K. 
B) Al. 
C) Cl. 
D) Se. 
E) Kr.

Question 4

Which of the elements listed below has the highest first ionization energy?

Accepted Answer

A) He 
B) Ne 
C) Ar 
D) Kr 
E) Xe 
A) He 
B) Ne 
C) Ar 
D) Kr 
E) Xe

Question 5

The first ionization energy of sodium is 495.9 kJ/mol. The energy change for the reaction Na(s)$\rarr$ Na+(g)+ e- is therefore

Accepted Answer

A) 495.9 kJ/mol. 
B) less than 495.9 kJ/mol. 
C) greater than 495.9 kJ/mol. 
D) is equal to the electron affinity of sodium. 
E) is equal to the second ionization energy of sodium. 
A) 495.9 kJ/mol. 
B) less than 495.9 kJ/mol. 
C) greater than 495.9 kJ/mol. 
D) is equal to the electron affinity of sodium. 
E) is equal to the second ionization energy of sodium.

Question 6

Which of the following is an acidic oxide?

Accepted Answer

A) P4O10 
B) MgO 
C) Fe2O3 
D) K2O 
E) Cr2O3 
A) P4O10 
B) MgO 
C) Fe2O3 
D) K2O 
E) Cr2O3

Question 7

How many electrons are in the 4p orbitals of vanadium?

Accepted Answer

A) 0 
B) 2 
C) 4 
D) 5 
E) 6 
A) 0 
B) 2 
C) 4 
D) 5 
E) 6

Question 8

Write the ground-state electron configuration for Al3+.

Accepted Answer

Question 9

For silicon atoms, which ionization energy will show an exceptionally large increase over the preceding ionization energy?

Accepted Answer

A) 2nd 
B) 3rd 
C) 4th 
D) 5th 
E) 6th 
A) 2nd 
B) 3rd 
C) 4th 
D) 5th 
E) 6th

Question 10

Write the ground-state electron configuration for Br-.

Accepted Answer

Question 11

How many valence electrons does a tin (Sn)atom have?

Accepted Answer

A) 2 
B) 4 
C) 14 
D) 36 
E) 50 
A) 2 
B) 4 
C) 14 
D) 36 
E) 50

Question 12

Which of the following elements behaves chemically similarly to potassium?

Accepted Answer

A) magnesium 
B) sodium 
C) beryllium 
D) chlorine 
E) iron 
A) magnesium 
B) sodium 
C) beryllium 
D) chlorine 
E) iron

Question 13

Which one of the following does not have [Kr] as its electronic configuration?

Accepted Answer

A) Se2- 
B) Br- 
C) Rb+ 
D) Y3+ 
E) Zn2+ 
A) Se2- 
B) Br- 
C) Rb+ 
D) Y3+ 
E) Zn2+

Question 14

Which two electron configurations represent elements that would have similar chemical properties? (1)1s22s22p4 (2)1s22s22p5 (3)[Ar]4s23d5 (4)[Ar]4s23d104p5

Accepted Answer

A) (1)and (2) 
B) (1)and (3) 
C) (2)and (3) 
D) (2)and (4) 
E) (3)and (4) 
A) (1)and (2) 
B) (1)and (3) 
C) (2)and (3) 
D) (2)and (4) 
E) (3)and (4)

Question 15

Consider the following reaction 2A + 3F2 $\rarr$2AF3. What is the formula for the reaction product if we substitute sulfur for fluorine?

Accepted Answer

A) A2S3 
B) A3S2 
C) AS3 
D) A3S 
E) AS 
A) A2S3 
B) A3S2 
C) AS3 
D) A3S 
E) AS

Question 16

Which of the following ground-state ions has the largest number of unpaired electrons?

Accepted Answer

A) Cr2+ 
B) Mn2+ 
C) Ni2+ 
D) Cu+ 
E) Co2+ 
A) Cr2+ 
B) Mn2+ 
C) Ni2+ 
D) Cu+ 
E) Co2+

Question 17

The general electron configuration for atoms of the halogen group is

Accepted Answer

A) ns2np6. 
B) ns2np5. 
C) ns2np6(n -1)d7. 
D) ns1. 
E) ns2np7. 
A) ns2np6. 
B) ns2np5. 
C) ns2np6(n -1)d7. 
D) ns1. 
E) ns2np7.

Question 18

Which of the following elements has the greatest metallic character?

Accepted Answer

A) Br 
B) Se 
C) Ni 
D) As 
E) Si 
A) Br 
B) Se 
C) Ni 
D) As 
E) Si

Question 19

Which of the following is a basic oxide?

Accepted Answer

A) CO2 
B) MgO 
C) As2O3 
D) SO2 
E) Cl2O7 
A) CO2 
B) MgO 
C) As2O3 
D) SO2 
E) Cl2O7

Question 20

Which pair of elements from different groups resemble each other the most in their chemical properties?

Accepted Answer

A) Be and B 
B) Al and Si 
C) Li and Be 
D) Al and Be 
E) Be and C 
A) Be and B 
B) Al and Si 
C) Li and Be 
D) Al and Be 
E) Be and C

Exam 8: The Periodic Table

The sulfide ion, S2-, is isoelectronic with which one of the following?

Given the following melting point data, what is a reasonable estimate of the melting point of potassium?

The successive ionization energies of a certain element are I1 = 577.9 kJ/mol, I2 = 1820 kJ/mol, I3= 2750 kJ/mol, I4 = 11,600 kJ/mol, and I5 = 14,800 kJ/mol. This pattern of ionization energies suggests that the unknown element is

Which of the elements listed below has the highest first ionization energy?

The first ionization energy of sodium is 495.9 kJ/mol. The energy change for the reaction Na(s) →\rarr→ Na+(g)+ e- is therefore

Which of the following is an acidic oxide?

How many electrons are in the 4p orbitals of vanadium?

Write the ground-state electron configuration for Al3+.

For silicon atoms, which ionization energy will show an exceptionally large increase over the preceding ionization energy?

Write the ground-state electron configuration for Br-.

How many valence electrons does a tin (Sn)atom have?

Which of the following elements behaves chemically similarly to potassium?

Which one of the following does not have [Kr] as its electronic configuration?

Which two electron configurations represent elements that would have similar chemical properties? (1)1s22s22p4 (2)1s22s22p5 (3)[Ar]4s23d5 (4)[Ar]4s23d104p5

Consider the following reaction 2A + 3F2 →\rarr→ 2AF3. What is the formula for the reaction product if we substitute sulfur for fluorine?

Which of the following ground-state ions has the largest number of unpaired electrons?

The general electron configuration for atoms of the halogen group is

Which of the following elements has the greatest metallic character?

Which of the following is a basic oxide?

Which pair of elements from different groups resemble each other the most in their chemical properties?

Introduction

Atoms, Molecules, and Ions

Stoichiometry

Reactions in Aqueous Solution

Gases

Energy Relationships in Chemical Reactions

The Electronic Structure of Atoms

Chemical Bonding I: the Covalent Bond

Chemical Bonding Ii: Molecular Geometry and Hybridization of Atomic Orbitals

Introduction to Organic Chemistry

Intermolecular Forces and Liquids and Solids

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Thermodynamics

Redox Reactions and Electrochemistry

The Chemistry of Coordination Compounds

Nuclear Chemistry

Organic Polymerssynthetic and Natural

Filters

The sulfide ion, S^2-, is isoelectronic with which one of the following?

The successive ionization energies of a certain element are I₁= 577.9 kJ/mol, I₂= 1820 kJ/mol, I₃= 2750 kJ/mol, I₄ = 11,600 kJ/mol, and I₅ = 14,800 kJ/mol. This pattern of ionization energies suggests that the unknown element is

The first ionization energy of sodium is 495.9 kJ/mol. The energy change for the reaction Na(s) $\rarr$ Na⁺(g)+ e^- is therefore

Write the ground-state electron configuration for Al³⁺.

Write the ground-state electron configuration for Br^-.

Which two electron configurations represent elements that would have similar chemical properties? (1)1s²2s²2p⁴ (2)1s²2s²2p⁵ (3)[Ar]4s²3d⁵ (4)[Ar]4s²3d¹⁰4p⁵

Consider the following reaction 2A + 3F₂ $\rarr$ 2AF₃. What is the formula for the reaction product if we substitute sulfur for fluorine?