Question 1

-What kind of decay process is occurring in the decay of isotope A to isotope B in the figure shown above?

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 2

Which reaction below represents   Decay by electron capture?

Accepted Answer

A)    +   →   
B)    +   →   
C)    +   →   
D)    +   →   
A)    +   →   
B)    +   →   
C)    +   →   
D)    +   →

Question 3

When a substance decays by beta emission,the mass number of the nucleus ________ and the atomic number ________.

Accepted Answer

A) decreases by 1,remains the same 
B) increases by 1,remains the same 
C) remains the same,decreases by 1 
D) remains the same,increases by 1 
A) decreases by 1,remains the same 
B) increases by 1,remains the same 
C) remains the same,decreases by 1 
D) remains the same,increases by 1

Question 4

Identify the chemical symbol of element Q in

Accepted Answer

A) Br 
B) Hg 
C) Pd 
D) Se 
A) Br 
B) Hg 
C) Pd 
D) Se

Question 5

Which one of the following compounds contains ionic bonds?

Accepted Answer

A) CaO 
B) HF 
C) NI3 
D) SiO2 
A) CaO 
B) HF 
C) NI3 
D) SiO2

Question 6

The number of electrons in the ion Ca2+ is ________.

Accepted Answer

Question 7

Which of the species below has 28 protons and 26 electrons?

Accepted Answer

A) Fe2+ 
B) Ni2+ 
C)    
D)    
A) Fe2+ 
B) Ni2+ 
C)    
D)

Question 8

-If shaded and unshaded spheres represent atoms of different elements,which of the above drawings most likely represents a molecular compound at room temperature and a pressure of 1 atm?

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 9

What is the element symbol for an atom that has 5 protons and 6 neutrons?

Accepted Answer

A) B 
B) C 
C) H 
D) Na 
A) B 
B) C 
C) H 
D) Na

Question 10

Which of the following statements is not correct when balancing a nuclear equation?
I.The mass numbers must be conserved on both sides of the reaction arrow.
II.The ionic charges must be conserved on both sides of the reaction arrow.
III.The atomic numbers must be conserved on both sides of the reaction arrow.
IV.The elements must be the same on both sides of the reaction arrow.

Accepted Answer

A) II only 
B) II and III 
C) I and III 
D) II and IV 
A) II only 
B) II and III 
C) I and III 
D) II and IV

Question 11

Sodium metal and water react to form hydrogen and sodium hydroxide.If 5.98 g of sodium react with water to form 0.26 g of hydrogen and 10.40 g of sodium hydroxide,what mass of water was consumed in the reaction?

Accepted Answer

A) 4)68 g 
B) 5)98 g 
C) 10.14 g 
D) 10.66 g 
A) 4)68 g 
B) 5)98 g 
C) 10.14 g 
D) 10.66 g

Question 12

Which reaction below represents  Decay by positron emission?

Accepted Answer

A)    →   +   
B)    →   +   
C)    →   +   
D)    →   +   
A)    →   +   
B)    →   +   
C)    →   +   
D)    →   +

Question 13

What is the chemical formula for iron(II)phosphate?

Accepted Answer

A) Fe2P 
B) Fe2PO4 
C) Fe3P2 
D) Fe3(PO4)2 
A) Fe2P 
B) Fe2PO4 
C) Fe3P2 
D) Fe3(PO4)2

Question 14

How many protons (p)and neutrons (n)are in an atom of barium-130?

Accepted Answer

A) 56 p,74 n 
B) 56 p,130 n 
C) 74 p,56 n 
D) 130 p,56 n 
A) 56 p,74 n 
B) 56 p,130 n 
C) 74 p,56 n 
D) 130 p,56 n

Question 15

In which set do all elements tend to form anions in binary ionic compounds?

Accepted Answer

A) C,S,Pb 
B) K,Fe,Br 
C) Li,Na,K 
D) N,O,I 
A) C,S,Pb 
B) K,Fe,Br 
C) Li,Na,K 
D) N,O,I

Question 16

The number of protons,neutrons,and total nucleons in   
are ________,________,and ________,respectively.

Accepted Answer

The answer of The number of protons,neutrons,and total nucleons in...

Question 17

Which of the following represent isotopes?
A:  
[ ] B:  
[ ] C:  
[ ] D:  
[ ]

Accepted Answer

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

Question 18

The isotope represented by  
 is named

Accepted Answer

A) carbon-6 
B) carbon-7 
C) carbon-13 
D) carbon-19 
A) carbon-6 
B) carbon-7 
C) carbon-13 
D) carbon-19

Question 19

Use the periodic table below to answer the following questions.  
-Which is most likely to form a binary oxide with the formula M2O3 (where M = element A,B,C,or D)?

Accepted Answer

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

Question 20

Which is the only element that contains more protons than neutrons in its most abundant stable isotope?

Accepted Answer

A) boron 
B) carbon 
C) hydrogen 
D) mercury 
A) boron 
B) carbon 
C) hydrogen 
D) mercury

Exam 2: Atoms, molecules, and Ions

-What kind of decay process is occurring in the decay of isotope A to isotope B in the figure shown above?

Which reaction below represents Decay by electron capture?

When a substance decays by beta emission,the mass number of the nucleus ________ and the atomic number ________.

Identify the chemical symbol of element Q in

Which one of the following compounds contains ionic bonds?

The number of electrons in the ion Ca2+ is ________.

Which of the species below has 28 protons and 26 electrons?

-If shaded and unshaded spheres represent atoms of different elements,which of the above drawings most likely represents a molecular compound at room temperature and a pressure of 1 atm?

What is the element symbol for an atom that has 5 protons and 6 neutrons?

Sodium metal and water react to form hydrogen and sodium hydroxide.If 5.98 g of sodium react with water to form 0.26 g of hydrogen and 10.40 g of sodium hydroxide,what mass of water was consumed in the reaction?

Which reaction below represents Decay by positron emission?

What is the chemical formula for iron(II)phosphate?

How many protons (p)and neutrons (n)are in an atom of barium-130?

In which set do all elements tend to form anions in binary ionic compounds?

The number of protons,neutrons,and total nucleons in are ________,________,and ________,respectively.

Which of the following represent isotopes? A: [ ] B: [ ] C: [ ] D: [ ]

The isotope represented by is named

Use the periodic table below to answer the following questions. -Which is most likely to form a binary oxide with the formula M2O3 (where M = element A,B,C,or D)?

Which is the only element that contains more protons than neutrons in its most abundant stable isotope?

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

Organic and Biological Chemistry

Filters

When a substance decays by beta emission,the mass number of the nucleus and the atomic number .

The number of electrons in the ion Ca²⁺ is ________.

The number of protons,neutrons,and total nucleons in are ,,and ,respectively.

The isotope represented by ^{is named}

Use the periodic table below to answer the following questions. -Which is most likely to form a binary oxide with the formula M₂O₃ (where M = element A,B,C,or D)?