Question 1

In the following drawings,shaded spheres represent cations and unshaded spheres represent anions.  
-Which drawing represents the ionic compound Mg3(PO4)2?

Accepted Answer

A) drawing (a) 
B) drawing (b) 
C) drawing (c) 
D) drawing (d) 
A) drawing (a) 
B) drawing (b) 
C) drawing (c) 
D) drawing (d)

Question 2

Chlorine has two common isotopes,chlorine-35 and chlorine-37,and an atomic mass of 35.45 amu.The natural abundance of chlorine-35 is ________ (greater than,less than,the same as)the natural abundance of chlorine-37.

Accepted Answer

The answer of Chlorine has two common isotopes,chlorine-35 and chlorine-37,and...

Question 3

The charge to mass ratio of an electron was determined from Rutherford's cathode-ray tube experiment to be 1.759 × 108 C/g and the charge on a single electron was determined from the Millikan oil drop experiment to be 1.602 × 10-19 C,so the mass of a single electron is ________.

Accepted Answer

Question 4

One mole of which element has the smallest mass?

Accepted Answer

A) Co 
B) Cu 
C) Ni 
D) Zn 
A) Co 
B) Cu 
C) Ni 
D) Zn

Question 5

Tritium,  ,is formed in the upper atmosphere when  Captures a neutron and then decays.What is the other product of this reaction?

Accepted Answer

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

Question 6

Boron-9 can be represented as

Accepted Answer

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

Question 7

Beta decay of 32P produces a beta particle and

Accepted Answer

A) (28Al.) 
B) (31P.) 
C) (32Si.) 
D) (32S.) 
A) (28Al.) 
B) (31P.) 
C) (32Si.) 
D) (32S.)

Question 8

Tell the type of decay process occurring in the following nuclear reaction.

Accepted Answer

A) α emission 
B) β emission 
C) γ emission 
D) electron capture or positron emission 
A) α emission 
B) β emission 
C) γ emission 
D) electron capture or positron emission

Question 9

The number of electrons in the ion C4- is ________.

Accepted Answer

Question 10

-Which of the above drawings represents a K+ ion?

Accepted Answer

A) drawing (a) 
B) drawing (b) 
C) drawing (c) 
D) drawing (d) 
A) drawing (a) 
B) drawing (b) 
C) drawing (c) 
D) drawing (d)

Question 11

A beta particle is

Accepted Answer

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

Question 12

The chemical formula for nitrous acid is

Accepted Answer

A) H3N(aq). 
B) H NO2(aq). 
C) H NO3(aq). 
D) H2N2O6(aq). 
A) H3N(aq). 
B) H NO2(aq). 
C) H NO3(aq). 
D) H2N2O6(aq).

Question 13

The symbol for technetium-98 is ________.

Accepted Answer

The answer of The symbol for technetium-98 is ________....

Question 14

Which of the following is not explained by Dalton's atomic theory?

Accepted Answer

A) conservation of mass during a chemical reaction 
B) the existence of more than one isotope of an element 
C) the law of definite proportions 
D) the law of multiple proportions 
A) conservation of mass during a chemical reaction 
B) the existence of more than one isotope of an element 
C) the law of definite proportions 
D) the law of multiple proportions

Question 15

The chemical formula for the sulfite ion is

Accepted Answer

A) S-. 
B) S 2-. 
C) SO32-. 
D) SO42-. 
A) S-. 
B) S 2-. 
C) SO32-. 
D) SO42-.

Question 16

Nuclei that are in the band of stability have a neutron/proton ratio ________ (equal to,greater than,less than)1:1.

Accepted Answer

The answer of Nuclei that are in the band of...

Question 17

Which are isotopes? An atom that has an atomic number of 20 and a mass number of 42 is an isotope of an atom that has

Accepted Answer

A) an atomic number of 21 and a mass number of 42. 
B) an atomic number of 20 and a mass number of 40. 
C) 22 neutrons and 20 protons. 
D) 22 protons and 20 neutrons. 
A) an atomic number of 21 and a mass number of 42. 
B) an atomic number of 20 and a mass number of 40. 
C) 22 neutrons and 20 protons. 
D) 22 protons and 20 neutrons.

Question 18

Give the molecular formula corresponding to the following ball-and-stick molecular representation of vitamin C (ascorbic acid)(gray = C,unshaded = H,black = O).In writing the formula,list the atoms in alphabetical order.

Accepted Answer

A) CHO 
B) C3H4O3 
C) C6H4O6 
D) C6H8O6 
A) CHO 
B) C3H4O3 
C) C6H4O6 
D) C6H8O6

Question 19

"Isotopes" are atoms with the same number of ________ but different number of ________.

Accepted Answer

A) electrons,protons 
B) neutrons,protons 
C) protons,electrons 
D) protons,neutrons 
A) electrons,protons 
B) neutrons,protons 
C) protons,electrons 
D) protons,neutrons

Question 20

The definitive distinction between ionic bonding and covalent bonding is that

Accepted Answer

A) ionic bonding involves a sharing of electrons and covalent bonding involves a transfer of electrons. 
B) ionic bonding involves a transfer of electrons and covalent bonding involves a sharing of electrons. 
C) ionic bonding requires two nonmetals and covalent bonding requires a metal and a nonmetal. 
D) covalent bonding requires two nonmetals and ionic bonding requires a metal and a nonmetal. 
A) ionic bonding involves a sharing of electrons and covalent bonding involves a transfer of electrons. 
B) ionic bonding involves a transfer of electrons and covalent bonding involves a sharing of electrons. 
C) ionic bonding requires two nonmetals and covalent bonding requires a metal and a nonmetal. 
D) covalent bonding requires two nonmetals and ionic bonding requires a metal and a nonmetal.

Exam 2: Atoms, molecules, and Ions

In the following drawings,shaded spheres represent cations and unshaded spheres represent anions. -Which drawing represents the ionic compound Mg3(PO4)2?

Chlorine has two common isotopes,chlorine-35 and chlorine-37,and an atomic mass of 35.45 amu.The natural abundance of chlorine-35 is ________ (greater than,less than,the same as)the natural abundance of chlorine-37.

The charge to mass ratio of an electron was determined from Rutherford's cathode-ray tube experiment to be 1.759 × 108 C/g and the charge on a single electron was determined from the Millikan oil drop experiment to be 1.602 × 10-19 C,so the mass of a single electron is ________.

One mole of which element has the smallest mass?

Tritium, ,is formed in the upper atmosphere when Captures a neutron and then decays.What is the other product of this reaction?

Boron-9 can be represented as

Beta decay of 32P produces a beta particle and

Tell the type of decay process occurring in the following nuclear reaction.

The number of electrons in the ion C4- is ________.

-Which of the above drawings represents a K+ ion?

A beta particle is

The chemical formula for nitrous acid is

The symbol for technetium-98 is ________.

Which of the following is not explained by Dalton's atomic theory?

The chemical formula for the sulfite ion is

Nuclei that are in the band of stability have a neutron/proton ratio ________ (equal to,greater than,less than)1:1.

Which are isotopes? An atom that has an atomic number of 20 and a mass number of 42 is an isotope of an atom that has

Give the molecular formula corresponding to the following ball-and-stick molecular representation of vitamin C (ascorbic acid)(gray = C,unshaded = H,black = O).In writing the formula,list the atoms in alphabetical order.

"Isotopes" are atoms with the same number of ________ but different number of ________.

The definitive distinction between ionic bonding and covalent bonding is that

Chemistry: Matter and Measurement

Formulas, equations, and Moles

Reactions in Aqueous Solutions

Periodicity and the Atomic Structure of Atoms

Ionic Bonds and Some Main-Group Chemistry

Covalent Bonds and Molecular Structure

Thermochemistry: Chemical Energy

Gases: Their Properties and Behavior

Liquids,solids,and Phase Changes

Solutions and Their Properties

Chemical Kinetics

Chemical Equilibrium

Aqueous Equilibria: Acids and Bases

Applications of Aqueous Equilibria

Thermodynamics: Entropy, free Energy, and Equilibrium

Electrochemistry

Hydrogen, oxygen, and Water

The Main-Group Elements

Transition Elements and Coordination Chemistry

Metals and Solid-State Materials

Nuclear Chemistry

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In the following drawings,shaded spheres represent cations and unshaded spheres represent anions. -Which drawing represents the ionic compound Mg₃(PO₄)₂?

The charge to mass ratio of an electron was determined from Rutherford's cathode-ray tube experiment to be 1.759 × 10⁸ C/g and the charge on a single electron was determined from the Millikan oil drop experiment to be 1.602 × 10^-19 C,so the mass of a single electron is ________.

Beta decay of ³²P produces a beta particle and

The number of electrons in the ion C^4- is ________.

-Which of the above drawings represents a K⁺ ion?

"Isotopes" are atoms with the same number of but different number of .