Question 1

A certain ion contains 47 protons and 46 electrons. The ion is:

Accepted Answer

A) Pd+ 
B) Pd −  
C) Ag+ 
D) Ag −  
E) Can't tell from the given information 
A) Pd+ 
B) Pd −  
C) Ag+ 
D) Ag −  
E) Can't tell from the given information C

Question 2

Isotopes of an element have the same number of _____ but a different number of _____.

Accepted Answer

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

Question 3

Which scientist is responsible for the theory which explains why properties of elements recur in a periodic fashion?

Accepted Answer

A) Bohr 
B) Galileo 
C) Dalton 
D) Avogadro 
E) Mendeleev 
A) Bohr 
B) Galileo 
C) Dalton 
D) Avogadro 
E) Mendeleev A

Question 4

The Cl −  ion contains _____ protons and _____ electrons.

Accepted Answer

A) 17, 17 
B) 17, 18 
C) 18, 16 
D) 18, 18 
E) 16, 17 
A) 17, 17 
B) 17, 18 
C) 18, 16 
D) 18, 18 
E) 16, 17

Question 5

Metals tend to _____ electrons to form ions of _____ charge.

Accepted Answer

A) lose, negative 
B) lose, positive 
C) gain, positive 
D) gain, negative 
A) lose, negative 
B) lose, positive 
C) gain, positive 
D) gain, negative

Question 6

Which of these elements is not a transition metal?

Accepted Answer

A) Cu 
B) Fe 
C) Na 
D) Ag 
E) Hg 
A) Cu 
B) Fe 
C) Na 
D) Ag 
E) Hg

Question 7

An element has two naturally occurring isotopes. One has an abundance of 37.4% and an isotopic mass of 184.953 amu. The other has an abundance of 62.6% and a mass of 186.956 amu. What is the atomic weight of the element?

Accepted Answer

A) 185.702 amu 
B) 185.954 amu 
C) 186.207 amu 
D) 186.956 amu 
E) 190.234 amu 
A) 185.702 amu 
B) 185.954 amu 
C) 186.207 amu 
D) 186.956 amu 
E) 190.234 amu

Question 8

Carbon has three isotopes: 12C, 13C, and 14C. These isotopes each have _____ protons, _____  electrons and _____ , _____ , and _____  neutrons respectively.

Accepted Answer

A) 6, 6, and 6, 7, 8 
B) 12, 12, and 6, 7, 8 
C) 12, 12, and 12, 13, 14 
D) 6, 6, and 12, 13, 14 
E) 12, 12, and 24, 25, 26 
A) 6, 6, and 6, 7, 8 
B) 12, 12, and 6, 7, 8 
C) 12, 12, and 12, 13, 14 
D) 6, 6, and 12, 13, 14 
E) 12, 12, and 24, 25, 26

Question 9

The atomic mass of fluorine (F)is 19.00. Which of the following is not true?

Accepted Answer

A) An atom of F has a mass of 19.00 amu. 
B) One mole of F has a mass of 19.00 g. 
C) 6.02 x 1023 atoms of F has a mass of 19.00 g. 
D) 6.02 x 1023 atoms of F has a mass of 19.00 amu. 
A) An atom of F has a mass of 19.00 amu. 
B) One mole of F has a mass of 19.00 g. 
C) 6.02 x 1023 atoms of F has a mass of 19.00 g. 
D) 6.02 x 1023 atoms of F has a mass of 19.00 amu.

Question 10

He has the same number of valence electrons as _____.

Accepted Answer

A) H 
B) Ne 
C) Be 
D) F 
A) H 
B) Ne 
C) Be 
D) F

Question 11

Which of the following has the largest mass of oxygen ?

Accepted Answer

A) 16.0 g of O2 
B) 0.500 mole of O2 
C) 6.022 × 1023 molecules of O2 
D) 10 grams of carbon dioxide CO2 
E) All of these have the same mass of oxygen. 
A) 16.0 g of O2 
B) 0.500 mole of O2 
C) 6.022 × 1023 molecules of O2 
D) 10 grams of carbon dioxide CO2 
E) All of these have the same mass of oxygen.

Question 12

These elements Li, Na, K, Rb, and Cs are members of what group\family?

Accepted Answer

A) halogens 
B) noble gases 
C) alkali metals 
D) transition metals 
E) alkaline earth metals 
A) halogens 
B) noble gases 
C) alkali metals 
D) transition metals 
E) alkaline earth metals

Question 13

What is the charge on an ion that contains 16 protons and 18 electrons?

Accepted Answer

A) 0 
B) +2 
C) − 2 
D) It depends on the number of neutrons. 
E) None of these. 
A) 0 
B) +2 
C) − 2 
D) It depends on the number of neutrons. 
E) None of these.

Question 14

Which of these is the correct representation for the ion with Z=27, A=60, and C=2+ ?

Accepted Answer

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

Question 15

Calculate the number of moles in a 233 gram sample of barium.

Accepted Answer

A) 0.589 moles 
B) 1.70 moles 
C) 3.20 × 104 
D) 6.022 × 1023 moles 
E) 1.02 × 1024 moles 
A) 0.589 moles 
B) 1.70 moles 
C) 3.20 × 104 
D) 6.022 × 1023 moles 
E) 1.02 × 1024 moles

Question 16

Which of these statements about Bohr's model of the atom is incorrect ?

Accepted Answer

A) Electrons fill lower energy orbits first. 
B) The greater the quantum number the higher the energy of an orbit. 
C) Electrons occupy orbits with certain radii corresponding to discrete energies. 
D) Elements with the same number of electrons in their outer orbit have similar properties. 
E) All of these statements are correct. 
A) Electrons fill lower energy orbits first. 
B) The greater the quantum number the higher the energy of an orbit. 
C) Electrons occupy orbits with certain radii corresponding to discrete energies. 
D) Elements with the same number of electrons in their outer orbit have similar properties. 
E) All of these statements are correct.

Question 17

Which of these statements concerning atomic mass is correct?

Accepted Answer

A) Atomic mass is the same as the mass number of the most common isotope. 
B) Atomic mass is derived from the weight of the most common isotope of the element. 
C) Atomic mass is determined by adding the masses of the protons, electrons, and neutrons in the atom. 
D) Atomic mass is calculated from the atomic mass of the two most common isotopes. 
E) Atomic mass is a weighted average of the masses of the naturally occurring isotopes. 
A) Atomic mass is the same as the mass number of the most common isotope. 
B) Atomic mass is derived from the weight of the most common isotope of the element. 
C) Atomic mass is determined by adding the masses of the protons, electrons, and neutrons in the atom. 
D) Atomic mass is calculated from the atomic mass of the two most common isotopes. 
E) Atomic mass is a weighted average of the masses of the naturally occurring isotopes.

Question 18

Which of these is the correct chemical symbol for potassium?

Accepted Answer

A) K 
B) Po 
C) P 
D) Pd 
E) Pt 
A) K 
B) Po 
C) P 
D) Pd 
E) Pt

Question 19

Metals tend to form ions with a positive charge. The most likely way to form a positively charged ion from an atom is by doing which of the following?

Accepted Answer

A) Gaining electron(s). 
B) Gaining proton(s). 
C) Losing electron(s). 
D) Losing proton(s). 
E) Losing neutron(s). 
A) Gaining electron(s). 
B) Gaining proton(s). 
C) Losing electron(s). 
D) Losing proton(s). 
E) Losing neutron(s).

Question 20

What are the Z and A values for an atom of krypton which contains 46 neutrons?

Accepted Answer

A) Z=36, A=46 
B) Z=46, A=36 
C) Z=36, A=82 
D) Z=82, A=36 
E) Z=82, A=46 
A) Z=36, A=46 
B) Z=46, A=36 
C) Z=36, A=82 
D) Z=82, A=36 
E) Z=82, A=46

A certain ion contains 47 protons and 46 electrons. The ion is:

Isotopes of an element have the same number of _ but a different number of _.

Which scientist is responsible for the theory which explains why properties of elements recur in a periodic fashion?

The Cl⁻ ion contains _ protons and _ electrons.

Metals tend to _ electrons to form ions of _ charge.

Which of these elements is not a transition metal?

An element has two naturally occurring isotopes. One has an abundance of 37.4% and an isotopic mass of 184.953 amu. The other has an abundance of 62.6% and a mass of 186.956 amu. What is the atomic weight of the element?

Carbon has three isotopes: ¹²C, ¹³C, and ¹⁴C. These isotopes each have ___ protons, _ electrons and _ , _ , and ___ neutrons respectively.

The atomic mass of fluorine (F)is 19.00. Which of the following is not true?

He has the same number of valence electrons as _____.

Which of the following has the largest mass of oxygen ?

These elements Li, Na, K, Rb, and Cs are members of what group\family?

What is the charge on an ion that contains 16 protons and 18 electrons?

Which of these is the correct representation for the ion with Z=27, A=60, and C=2⁺ ?

Calculate the number of moles in a 233 gram sample of barium.

Which of these statements about Bohr's model of the atom is incorrect ?

Which of these statements concerning atomic mass is correct?

Which of these is the correct chemical symbol for potassium?

Metals tend to form ions with a positive charge. The most likely way to form a positively charged ion from an atom is by doing which of the following?

What are the Z and A values for an atom of krypton which contains 46 neutrons?

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Exam 3: Atoms and Elements

A certain ion contains 47 protons and 46 electrons. The ion is:

Isotopes of an element have the same number of _____ but a different number of _____.

Which scientist is responsible for the theory which explains why properties of elements recur in a periodic fashion?

The Cl − ion contains _____ protons and _____ electrons.

Metals tend to _____ electrons to form ions of _____ charge.

Which of these elements is not a transition metal?

An element has two naturally occurring isotopes. One has an abundance of 37.4% and an isotopic mass of 184.953 amu. The other has an abundance of 62.6% and a mass of 186.956 amu. What is the atomic weight of the element?

Carbon has three isotopes: 12C, 13C, and 14C. These isotopes each have _____ protons, _____ electrons and _____ , _____ , and _____ neutrons respectively.

The atomic mass of fluorine (F)is 19.00. Which of the following is not true?

He has the same number of valence electrons as _____.

Which of the following has the largest mass of oxygen ?

These elements Li, Na, K, Rb, and Cs are members of what group\family?

What is the charge on an ion that contains 16 protons and 18 electrons?

Which of these is the correct representation for the ion with Z=27, A=60, and C=2+ ?

Calculate the number of moles in a 233 gram sample of barium.

Which of these statements about Bohr's model of the atom is incorrect ?

Which of these statements concerning atomic mass is correct?

Which of these is the correct chemical symbol for potassium?

Metals tend to form ions with a positive charge. The most likely way to form a positively charged ion from an atom is by doing which of the following?

What are the Z and A values for an atom of krypton which contains 46 neutrons?

Molecular Reasons

The Chemists Toolbox

Molecules, Compounds, and Chemical Reactions

Chemical Bonding

Organic Chemistry

Light and Color

Nuclear Chemistry

Energy for Today

Energy for Tomorrow: Solar and Other Renewable Energy Sources

The Air Around Us

The Liquids and Solids Around Us: Especially Water

Acids and Bases: the Molecules Responsible for Sour and Bitter

Oxidation and Reduction

The Chemistry of Household Products

Biochemistry and Biotechnology

Drugs and Medicine: Healing, Helping, and Hurting

The Chemistry of Food

Nanotechnology

Filters

Isotopes of an element have the same number of _ but a different number of _.

The Cl⁻ ion contains _ protons and _ electrons.

Metals tend to _ electrons to form ions of _ charge.

Carbon has three isotopes: ¹²C, ¹³C, and ¹⁴C. These isotopes each have ___ protons, _ electrons and _ , _ , and ___ neutrons respectively.

Which of these is the correct representation for the ion with Z=27, A=60, and C=2⁺ ?