Question 1

Which of the following atomic symbols is incorrect?

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) A) and E)
G) A) and D)

Question 2

The numbers of protons,neutrons,and electrons in + are: A) 20 p,19 n,19 e B) 20 p,19 n,20 e C) 19 p,20 n,20 e D) 19 p,20 n,19 e E) 19 p,20 n,18 e" class="answers-bank-image d-inline" rel="preload" > K+ are:

Accepted Answer

A)  20 p,19 n,19 e
B)  20 p,19 n,20 e
C)  19 p,20 n,20 e
D)  19 p,20 n,19 e
E)  19 p,20 n,18 eF) None of the above
G) C) and D)

Question 3

Which of the following has 61 neutrons,47 protons,and 46 electrons?

Accepted Answer

A)   + 
C)     Pd- 
D)     Cd+ 
E)     Ag" class="answers-bank-image d-inline" rel="preload" > Pm
B)   + 
C)     Pd- 
D)     Cd+ 
E)     Ag" class="answers-bank-image d-inline" rel="preload" > Ag+
C)   + 
C)     Pd- 
D)     Cd+ 
E)     Ag" class="answers-bank-image d-inline" rel="preload" > Pd-
D)   + 
C)     Pd- 
D)     Cd+ 
E)     Ag" class="answers-bank-image d-inline" rel="preload" > Cd+
E)   + 
C)     Pd- 
D)     Cd+ 
E)     Ag" class="answers-bank-image d-inline" rel="preload" > AgF) A) and C)
G) B) and E)

Question 4

Which of the following pairs of compounds can be used to illustrate the law of multiple proportions?

Accepted Answer

A)  NH4 and NH4Cl
B)  ZnO2 and ZnCl2
C)  H2O and HCl
D)  NO and NO2
E)  CH4 and CO2F) B) and D)
G) B) and C)

Question 5

An isotope,X,of a particular element has an atomic number of 15 and a mass number of 31.Therefore:

Accepted Answer

A)  X is an isotope of phosphorus.
B)  X has 16 neutrons per atom.
C)  X has an atomic mass of 30.973.
D)  A and B.
E)  A,B,and C.F) A) and C)
G) B) and E)

Question 6

Avogadro's hypothesis states that:

Accepted Answer

A)  Each atom of oxygen is 16 times more massive than an atom of hydrogen.
B)  A given compound always contains exactly the same proportion of elements by mass.
C)  When two elements form a series of compounds,the ratios of masses that combine with 1 gram of the first element can always be reduced to small whole numbers.
D)  At the same temperature and pressure,equal volumes of different gases contain an equal number of particles.
E)  Mass is neither created nor destroyed in a chemical reaction.F) A) and B)
G) C) and E)

Question 7

Which statement is not correct?

Accepted Answer

A)  The mass of an alpha particle is 7300 times that of the electron.
B)  An alpha particle has a 2+ charge.
C)  Three types of radioactive emission are gamma rays,beta rays,and alpha particles.
D)  A gamma ray is high-energy light.
E)  There are only three types of radioactivity known to scientists today.F) C) and D)
G) A) and C)

Question 8

Name the following compounds:
-CCl4

Accepted Answer

carbon tet...

Question 9

Write the formula for:
-sodium thiosulfate

Accepted Answer

The answer of Write the formula for:
-sodium thiosulfate...

Question 10

Write the formula for:
-acetic acid

Accepted Answer

The answer of Write the formula for:
-acetic acid...

Question 11

Which of the following statements from Dalton's atomic theory is no longer true,according to modern atomic theory?

Accepted Answer

A)  Elements are made up of tiny particles called atoms.
B)  Atoms are not created or destroyed in chemical reactions.
C)  All atoms of a given element are identical.
D)  Atoms are indivisible in chemical reactions.
E)  All of these statements are true according to modern atomic theory.F) C) and E)
G) A) and D)

Question 12

Write the formula for:
-aluminum hydroxide

Accepted Answer

Al(OH)<sub>3</sub>

Question 13

By knowing the number of protons a neutral atom has,you should be able to determine

Accepted Answer

A)  the number of neutrons in the neutral atom
B)  the number of electrons in the neutral atom
C)  the name of the atom
D)  two of the above
E)  none of the aboveF) B) and E)
G) B) and D)

Question 14

Write the chemical formulas for the following compounds or ions.
a)
nitrate ion
_________
b)
aluminum oxide
_________
c)
ammonium ion
_________
d)
perchloric acid
_________
e)
copper(II)bromide
_________

Accepted Answer

a)NO₃^- b)Al₂O...

Question 15

A species with 12 protons and 10 electrons is

Accepted Answer

A)  Ne2+
B)  Ti2+
C)  Mg2+
D)  Mg
E)  Ne2-F) A) and E)
G) A) and B)

Question 16

All of the following are true except:

Accepted Answer

A)  Ions are formed by adding electrons to a neutral atom.
B)  Ions are formed by changing the number of protons in an atom's nucleus.
C)  Ions are formed by removing electrons from a neutral atom.
D)  An ion has a positive or negative charge.
E)  Metals tend to form positive ions.F) A) and D)
G) B) and C)

Question 17

You are given a compound with the formula MCl2,in which M is a metal.You are told that the metal ion has 26 electrons.What is the identity of the metal?

Accepted Answer

A)  Fe
B)  Al
C)  Zn
D)  Co
E)  NiF) B) and E)
G) None of the above E

Question 18

Write the names of the following compounds:
a)
FeSO4
________________
b)
NaC2H3O2
________________
c)
KNO2
________________
d)
Ca(OH)2
________________
e)
NiCO3
________________

Accepted Answer

a)iron(II)sulfate
b)...

Question 19

Which of the following names is incorrect?

Accepted Answer

A)  cobalt(II) chloride
B)  magnesium oxide
C)  aluminum(III) oxide
D)  diphosphorus pentoxide
E)  All of the above names are correct.F) A) and B)
G) B) and E)

Question 20

All of the following are characteristics of metals except:

Accepted Answer

A)  good conductors of heat
B)  malleable
C)  ductile
D)  often lustrous
E)  tend to gain electrons in chemical reactionsF) C) and E)
G) A) and B) E

Exam 2: Atoms, molecules, and Ions

Which of the following atomic symbols is incorrect?

Correct AnswerverifiedShow Answer

The numbers of protons,neutrons,and electrons in K+ are:

Correct AnswerverifiedShow Answer

Which of the following has 61 neutrons,47 protons,and 46 electrons?

Correct AnswerverifiedShow Answer

Which of the following pairs of compounds can be used to illustrate the law of multiple proportions?

Correct AnswerverifiedShow Answer

An isotope,X,of a particular element has an atomic number of 15 and a mass number of 31.Therefore:

Correct AnswerverifiedShow Answer

Avogadro's hypothesis states that:

Correct AnswerverifiedShow Answer

Which statement is not correct?

Correct AnswerverifiedShow Answer

Name the following compounds: -CCl4

Correct Answerverifiedcarbon tet...View AnswerShow Answer

Write the formula for: -sodium thiosulfate

Correct AnswerverifiedShow Answer

Write the formula for: -acetic acid

Correct AnswerverifiedShow Answer

Which of the following statements from Dalton's atomic theory is no longer true,according to modern atomic theory?

Correct AnswerverifiedShow Answer

Write the formula for: -aluminum hydroxide

Correct AnswerverifiedAl(OH)3

By knowing the number of protons a neutral atom has,you should be able to determine

Correct AnswerverifiedShow Answer

Write the chemical formulas for the following compounds or ions. a) nitrate ion _________ b) aluminum oxide _________ c) ammonium ion _________ d) perchloric acid _________ e) copper(II)bromide _________

Correct Answerverifieda)NO3- b)Al2O...View AnswerShow Answer

A species with 12 protons and 10 electrons is

Correct AnswerverifiedShow Answer

All of the following are true except:

Correct AnswerverifiedShow Answer

You are given a compound with the formula MCl2,in which M is a metal.You are told that the metal ion has 26 electrons.What is the identity of the metal?

Correct AnswerverifiedE

Write the names of the following compounds: a) FeSO4 ________________ b) NaC2H3O2 ________________ c) KNO2 ________________ d) Ca(OH)2 ________________ e) NiCO3 ________________

Correct Answerverifieda)iron(II)sulfateb)...View AnswerShow Answer

Which of the following names is incorrect?

Correct AnswerverifiedShow Answer

All of the following are characteristics of metals except:

Correct AnswerverifiedE

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The numbers of protons,neutrons,and electrons in K⁺ are:

Correct Answer
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Name the following compounds: -CCl₄

Correct Answer
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carbon tet...
View Answer

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Al(OH)₃

Correct Answer
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Write the chemical formulas for the following compounds or ions. a) nitrate ion _____ b) aluminum oxide _ c) ammonium ion _ d) perchloric acid _ e) copper(II)bromide _____

Correct Answer
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a)NO₃^- b)Al₂O...
View Answer

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You are given a compound with the formula MCl₂,in which M is a metal.You are told that the metal ion has 26 electrons.What is the identity of the metal?

Correct Answer
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E

Write the names of the following compounds: a) FeSO₄ _{________________} b) NaC₂H₃O₂ _{________________} c) KNO₂ _{________________} d) Ca(OH)₂ _{________________} e) NiCO₃ _{________________}

Correct Answer
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a)iron(II)sulfate
b)...
View Answer

Correct Answer
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Correct Answer
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E