Question 1

Which element labeled A-E in the periodic table below will have an ionic charge of +2?

Accepted Answer

A) A 
B) B 
C) C 
D) D 
E) E 
A) A 
B) B 
C) C 
D) D 
E) E

Question 2

For each of the elements below, there are only two naturally occurring isotopes. Using information in your periodic table, identify the pair in which the lighter isotope is the more abundant one.

Accepted Answer

A) (6Li and 7Li) 
B) (79Br and 81Br) 
C) (10B and 11
B)  
D) (191Ir and 193Ir) 
E) (50V and 51V) 
A) (6Li and 7Li) 
B) (79Br and 81Br) 
C) (10B and 11
B)  
D) (191Ir and 193Ir) 
E) (50V and 51V)

Question 3

Based on its position in the periodic table, which atom would you predict to form a compound with three lithium atoms?

Accepted Answer

A) boron 
B) carbon 
C) nitrogen 
D) sulfur 
E) fluorine 
A) boron 
B) carbon 
C) nitrogen 
D) sulfur 
E) fluorine

Question 4

What is the symbol for magnesium?

Accepted Answer

A) M 
B) Mg 
C) Mn 
D) Mo 
E) Ma 
A) M 
B) Mg 
C) Mn 
D) Mo 
E) Ma

Question 5

Which letter below represents the halogen group? A B C D E

Accepted Answer

A) A 
B) B 
C) C 
D) D 
E) E 
A) A 
B) B 
C) C 
D) D 
E) E

Question 6

How many atoms of each element are there in the compound Na3(PO4)3?

Accepted Answer

A) sodium 3, phosphorus 3, oxygen 12 
B) sodium 9, phosphorus 3, oxygen 12 
C) sodium 3, phosphorus 1, oxygen 4 
D) sodium 3, potassium 1, oxygen 4 
E) sodium 9, potassium 3, oxygen 12 
A) sodium 3, phosphorus 3, oxygen 12 
B) sodium 9, phosphorus 3, oxygen 12 
C) sodium 3, phosphorus 1, oxygen 4 
D) sodium 3, potassium 1, oxygen 4 
E) sodium 9, potassium 3, oxygen 12

Question 7

Which one of the following statements is not consistent with Dalton's atomic view of matter?

Accepted Answer

A) Atoms of one element can be converted into atoms of another element. 
B) Each element is composed of atoms that are identical in size, mass, and chemical properties. 
C) Compounds are formed from different atoms in simple whole number ratios. 
D) Atoms of different elements can combine in several different proportions to make different compounds. 
E) Matter is discrete, as proposed by Democritus. 
A) Atoms of one element can be converted into atoms of another element. 
B) Each element is composed of atoms that are identical in size, mass, and chemical properties. 
C) Compounds are formed from different atoms in simple whole number ratios. 
D) Atoms of different elements can combine in several different proportions to make different compounds. 
E) Matter is discrete, as proposed by Democritus.

Question 8

Which element labeled A-E in the periodic table below will have an ionic charge of -1?

Accepted Answer

A) A 
B) B 
C) C 
D) D 
E) E 
A) A 
B) B 
C) C 
D) D 
E) E

Question 9

Based on its position in the periodic table, which single atom would you predict to form a compound with two ammonium ions?

Accepted Answer

A) boron 
B) carbon 
C) nitrogen 
D) sulfur 
E) fluorine 
A) boron 
B) carbon 
C) nitrogen 
D) sulfur 
E) fluorine

Question 10

What distinguishes one isotope from another?

Accepted Answer

Isotopes have the sa

Question 11

Which particle-level diagram is the best representation for a   atom?

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 12

Sulfur combines with oxygen and hydrogen to form two acids. Sulfuric acid has the formula ________, and sulfurous acid has the formula ________.

Accepted Answer

A) H2SO4; H2SO3 
B) H2SO3; H2SO4 
C) HSO4; HSO3 
D) HSO3; HSO4 
E) H2SO3; H2SO2 
A) H2SO4; H2SO3 
B) H2SO3; H2SO4 
C) HSO4; HSO3 
D) HSO3; HSO4 
E) H2SO3; H2SO2

Question 13

Zinc has five naturally occurring isotopes with an average mass of 65.39 amu. Three isotopes, in roughly equal amounts, account for 95% of zinc. Which isotope is most abundant?

Accepted Answer

A) (64Zn, 63.9291 amu) 
B) (66Zn, 65.9260 amu) 
C) (67Zn, 66.9271 amu) 
D) (68Zn, 67.9249 amu) 
E) (70Zn, 69.9253 amu) 
A) (64Zn, 63.9291 amu) 
B) (66Zn, 65.9260 amu) 
C) (67Zn, 66.9271 amu) 
D) (68Zn, 67.9249 amu) 
E) (70Zn, 69.9253 amu)

Question 14

What is the chemical formula for hexasulfur monoxide?

Accepted Answer

The answer of What is the chemical formula for hexasulfur...

Question 15

Oxygen is best described as a ________

Accepted Answer

A) metalloid. 
B) metal. 
C) transition metal. 
D) noble gas. 
E) nonmetal. 
A) metalloid. 
B) metal. 
C) transition metal. 
D) noble gas. 
E) nonmetal.

Question 16

Which statement is correct?

Accepted Answer

A) Electrons, protons, and neutrons have about the same mass. 
B) Electrons have a much smaller mass than that of protons and neutrons. 
C) Neutrons are much more massive than protons. 
D) Protons are much more massive than neutrons. 
E) Electrons have a much larger mass than that of protons and neutrons. 
A) Electrons, protons, and neutrons have about the same mass. 
B) Electrons have a much smaller mass than that of protons and neutrons. 
C) Neutrons are much more massive than protons. 
D) Protons are much more massive than neutrons. 
E) Electrons have a much larger mass than that of protons and neutrons.

Question 17

What is the chemical formula for hypochlorous acid?

Accepted Answer

The answer of What is the chemical formula for hypochlorous...

Question 18

Identify each of the following compounds as molecular or ionic:
 a) NO3 
b) CaCl2 
c) Cu(NO3)2 
d) CH3OH.

Accepted Answer

A) molecul

Question 19

The elements below are used in fireworks. Which one is not classified correctly according to its position in the periodic table?

Accepted Answer

A) Sodium is an alkali metal. 
B) Strontium is an alkaline earth metal. 
C) Iron is a transition metal. 
D) Phosphorus is a nonmetal. 
E) Sulfur is a metalloid. 
A) Sodium is an alkali metal. 
B) Strontium is an alkaline earth metal. 
C) Iron is a transition metal. 
D) Phosphorus is a nonmetal. 
E) Sulfur is a metalloid.

Question 20

Nuclear reactors used for power generation require uranium enriched in uranium-235. What is the average atomic mass of enriched uranium consisting of exactly 3.0% uranium-235 (235.04 amu) and 97.0% uranium-238 (238.05 amu)?

Accepted Answer

The answer of Nuclear reactors used for power generation require...

Exam 2: Atoms, Ions, and Molecules: Matter Starts Here

Which element labeled A-E in the periodic table below will have an ionic charge of +2?

For each of the elements below, there are only two naturally occurring isotopes. Using information in your periodic table, identify the pair in which the lighter isotope is the more abundant one.

Based on its position in the periodic table, which atom would you predict to form a compound with three lithium atoms?

What is the symbol for magnesium?

Which letter below represents the halogen group? A B C D E

How many atoms of each element are there in the compound Na3(PO4)3?

Which one of the following statements is not consistent with Dalton's atomic view of matter?

Which element labeled A-E in the periodic table below will have an ionic charge of -1?

Based on its position in the periodic table, which single atom would you predict to form a compound with two ammonium ions?

What distinguishes one isotope from another?

Which particle-level diagram is the best representation for a atom?

Sulfur combines with oxygen and hydrogen to form two acids. Sulfuric acid has the formula ________, and sulfurous acid has the formula ________.

Zinc has five naturally occurring isotopes with an average mass of 65.39 amu. Three isotopes, in roughly equal amounts, account for 95% of zinc. Which isotope is most abundant?

What is the chemical formula for hexasulfur monoxide?

Oxygen is best described as a ________

Which statement is correct?

What is the chemical formula for hypochlorous acid?

Identify each of the following compounds as molecular or ionic: a) NO3 b) CaCl2 c) Cu(NO3)2 d) CH3OH.

The elements below are used in fireworks. Which one is not classified correctly according to its position in the periodic table?

Nuclear reactors used for power generation require uranium enriched in uranium-235. What is the average atomic mass of enriched uranium consisting of exactly 3.0% uranium-235 (235.04 amu) and 97.0% uranium-238 (238.05 amu)?

Matter and Energy: The Origin of the Universe

Stoichiometry: Mass, Formulas, and Reactions

Solution Chemistry: The Hydrosphere

Thermochemistry: Energy Changes in Reactions

Properties of Gases: The Air We Breathe

A Quantum Model of Atoms: Waves and Particles

Chemical Bonds: What Makes a Gas a Greenhouse Gas

Molecular Geometry: Shape Determines Function

Intermolecular Forces: The Uniqueness of Water

Solutions: Properties and Behavior

Solids: Crystals, Alloys, and Polymers

Chemical Kinetics: Reactions in the Atmosphere

Chemical Equilibrium: How Much Product Does a Reaction Really Make

Acidbase Equilibria: Proton Transfer in Biological Systems

Additional Aqueous Equilibria: Chemistry and the Oceans

Thermodynamics: Spontaneous and Nonspontaneous Reactions and Processes

Electrochemistry: The Quest for Clean Energy

Nuclear Chemistry: Applications to Energy and Medicine

Organic and Biological Molecules: the Compounds of Life

The Main Group Elements: Life and the Periodic Table

Transition Metals: Biological and Medical Applications

Filters

How many atoms of each element are there in the compound Na₃(PO₄)₃?

Sulfur combines with oxygen and hydrogen to form two acids. Sulfuric acid has the formula , and sulfurous acid has the formula .

Identify each of the following compounds as molecular or ionic: a) NO₃ b) CaCl₂ c) Cu(NO₃)₂ d) CH₃OH.