Question 1

Which of the following elements is generally not found in the diatomic form in nature?

Accepted Answer

A)  C 
B)  N 
C)  O 
D)  F 
E)  H 
A)  C 
B)  N 
C)  O 
D)  F 
E)  H A

Question 2

Which of the following is not true of an atom that has an atomic number of 19 and a mass number of 41?

Accepted Answer

A)  The atom contains 22 neutrons. 
B)  The atom is potassium. 
C)  The atom contains 19 neutrons. 
D)  The atom contains 19 electrons. 
E)  The atom contains 19 protons. 
A)  The atom contains 22 neutrons. 
B)  The atom is potassium. 
C)  The atom contains 19 neutrons. 
D)  The atom contains 19 electrons. 
E)  The atom contains 19 protons. C

Question 3

Which of these elements is a metalloid?

Accepted Answer

A)  Ge 
B)  Br 
C)  Ar 
D)  Ca 
E)  Fe 
A)  Ge 
B)  Br 
C)  Ar 
D)  Ca 
E)  Fe A

Question 4

The elements in the column to the extreme right on the periodic table are called _____.

Accepted Answer

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

Question 5

Which of these statements about atoms is incorrect ?

Accepted Answer

A)  Atoms are the smallest visible particles of an element. 
B)  Atoms are composed of protons, neutrons, and electrons. 
C)  Atoms are the building blocks of all matter. 
D)  The smallest identifiable unit of an element is the atom. 
E)  There are 91 different naturally occurring atoms. 
A)  Atoms are the smallest visible particles of an element. 
B)  Atoms are composed of protons, neutrons, and electrons. 
C)  Atoms are the building blocks of all matter. 
D)  The smallest identifiable unit of an element is the atom. 
E)  There are 91 different naturally occurring atoms.

Question 6

Atoms with the same atomic number but different numbers of neutrons are called _____.

Accepted Answer

A)  ions 
B)  isotopes 
C)  metalloids 
D)  halogens 
E)  alkalis 
A)  ions 
B)  isotopes 
C)  metalloids 
D)  halogens 
E)  alkalis

Question 7

Which scientist is credited with developing the mole concept?

Accepted Answer

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

Question 8

How many protons, electrons, and neutrons   are in an  25  Mg  2+  ion?

Accepted Answer

A)  12 protons, 12 electrons, and 13 neutrons 
B)  12 protons, 10 electrons, and 12 neutrons 
C)  13 protons, 10 electrons, and 12 neutrons 
D)  12 protons, 10 electrons, and 13 neutrons 
E)  12 protons, 14 electrons, and 13 neutrons 
A)  12 protons, 12 electrons, and 13 neutrons 
B)  12 protons, 10 electrons, and 12 neutrons 
C)  13 protons, 10 electrons, and 12 neutrons 
D)  12 protons, 10 electrons, and 13 neutrons 
E)  12 protons, 14 electrons, and 13 neutrons

Question 9

Nonmetals tend to _____ electrons to form _____ ions.

Accepted Answer

A)  lose; negative 
B)  lose; positive 
C)  gain; positive 
D)  gain; negative 
E)  gain; neutral 
A)  lose; negative 
B)  lose; positive 
C)  gain; positive 
D)  gain; negative 
E)  gain; neutral

Question 10

Determine the number of atoms in a piece of silicon that has a mass of 15.0 grams.

Accepted Answer

A)  1.13 × 1024 atoms 
B)  1.69 × 1025 atoms 
C)  2.54 × 1020 atoms 
D)  3.21 × 1023 atoms 
E)  9.03 × 1024 atoms 
A)  1.13 × 1024 atoms 
B)  1.69 × 1025 atoms 
C)  2.54 × 1020 atoms 
D)  3.21 × 1023 atoms 
E)  9.03 × 1024 atoms

Question 11

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

Accepted Answer

A)  Pd+ 
B)  Pd −  
C)  Ag+ 
D)  Ag −  
E)  Cd2+ 
A)  Pd+ 
B)  Pd −  
C)  Ag+ 
D)  Ag −  
E)  Cd2+

Question 12

Which of these statements best describes the formation of a cation?

Accepted Answer

A)  An atom loses one or more electrons and becomes positively charged. 
B)  An atom loses one or more electrons and becomes negatively charged. 
C)  An atom gains one or more electrons and becomes positively charged. 
D)  An atom gains one or more electrons and becomes negatively charged. 
E)  An atom loses one or more electrons and becomes electrically neutral. 
A)  An atom loses one or more electrons and becomes positively charged. 
B)  An atom loses one or more electrons and becomes negatively charged. 
C)  An atom gains one or more electrons and becomes positively charged. 
D)  An atom gains one or more electrons and becomes negatively charged. 
E)  An atom loses one or more electrons and becomes electrically neutral.

Question 13

Which of these statements about an atom is incorrect ?

Accepted Answer

A)  The number of protons equals the number of electrons. 
B)  The number of protons equals the atomic number. 
C)  The number of protons always equals the number of neutrons. 
D)  The mass number is the sum of protons and neutrons in the atom. 
E)  The mass number minus the atomic number equals the number of neutrons in the atom. 
A)  The number of protons equals the number of electrons. 
B)  The number of protons equals the atomic number. 
C)  The number of protons always equals the number of neutrons. 
D)  The mass number is the sum of protons and neutrons in the atom. 
E)  The mass number minus the atomic number equals the number of neutrons in the atom.

Question 14

Determine the mass in grams of 1.15 × 1023 atoms of cobalt.

Accepted Answer

A)  0.191 grams 
B)  5.23 grams 
C)  11.2 grams 
D)  12.4 grams 
E)  308 grams 
A)  0.191 grams 
B)  5.23 grams 
C)  11.2 grams 
D)  12.4 grams 
E)  308 grams

Question 15

Which of these particles has a negative charge?

Accepted Answer

A)  Proton 
B)  Neutron 
C)  Electron 
D)  Nucleus 
E)  Cation 
A)  Proton 
B)  Neutron 
C)  Electron 
D)  Nucleus 
E)  Cation

Question 16

Which of the following is true?

Accepted Answer

A)  Oxygen and sulfur are in the same group. 
B)  Oxygen and sulfur are in different groups. 
C)  Oxygen and sulfur are in the same period. 
D)  Oxygen and fluorine are in different periods. 
E)  Oxygen and nitrogen are in the same group . 
A)  Oxygen and sulfur are in the same group. 
B)  Oxygen and sulfur are in different groups. 
C)  Oxygen and sulfur are in the same period. 
D)  Oxygen and fluorine are in different periods. 
E)  Oxygen and nitrogen are in the same group .

Question 17

One mole of nickel (Ni) has a mass of _____.

Accepted Answer

A)  28 amu 
B)  28 g 
C)  58.71 amu 
D)  58.71 g 
E)  30.71 g 
A)  28 amu 
B)  28 g 
C)  58.71 amu 
D)  58.71 g 
E)  30.71 g

Question 18

Determine the correct number of protons and electrons in F  −  .

Accepted Answer

A)  9 protons and 10 electrons 
B)  9 protons  and  11 electrons 
C)  10 protons  and  9 electrons 
D)  11 protons  and  10 electrons 
E)  19 protons  and  20 electrons 
A)  9 protons and 10 electrons 
B)  9 protons  and  11 electrons 
C)  10 protons  and  9 electrons 
D)  11 protons  and  10 electrons 
E)  19 protons  and  20 electrons

Question 19

Which of these elements is a metal?

Accepted Answer

A)  Mg 
B)  Br 
C)  Ar 
D)  Ge 
E)  B 
A)  Mg 
B)  Br 
C)  Ar 
D)  Ge 
E)  B

Question 20

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)

Which of the following elements is generally not found in the diatomic form in nature?

Which of the following is not true of an atom that has an atomic number of 19 and a mass number of 41?

Which of these elements is a metalloid?

The elements in the column to the extreme right on the periodic table are called _____.

Which of these statements about atoms is incorrect ?

Atoms with the same atomic number but different numbers of neutrons are called _____.

Which scientist is credited with developing the mole concept?

How many protons, electrons, and neutrons are in an ²⁵ Mg ²⁺ ion?

Nonmetals tend to _ electrons to form _ ions.

Determine the number of atoms in a piece of silicon that has a mass of 15.0 grams.

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

Which of these statements best describes the formation of a cation?

Which of these statements about an atom is incorrect ?

Determine the mass in grams of 1.15 × 10²³ atoms of cobalt.

Which of these particles has a negative charge?

Which of the following is true?

One mole of nickel (Ni) has a mass of _____.

Determine the correct number of protons and electrons in F ⁻ .

Which of these elements is a metal?

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

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Exam 3: Atoms and Elements

Which of the following elements is generally not found in the diatomic form in nature?

Which of the following is not true of an atom that has an atomic number of 19 and a mass number of 41?

Which of these elements is a metalloid?

The elements in the column to the extreme right on the periodic table are called _____.

Which of these statements about atoms is incorrect ?

Atoms with the same atomic number but different numbers of neutrons are called _____.

Which scientist is credited with developing the mole concept?

How many protons, electrons, and neutrons are in an 25 Mg 2+ ion?

Nonmetals tend to _____ electrons to form _____ ions.

Determine the number of atoms in a piece of silicon that has a mass of 15.0 grams.

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

Which of these statements best describes the formation of a cation?

Which of these statements about an atom is incorrect ?

Determine the mass in grams of 1.15 × 1023 atoms of cobalt.

Which of these particles has a negative charge?

Which of the following is true?

One mole of nickel (Ni) has a mass of _____.

Determine the correct number of protons and electrons in F − .

Which of these elements is a metal?

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

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 Online Only

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How many protons, electrons, and neutrons are in an ²⁵ Mg ²⁺ ion?

Nonmetals tend to _ electrons to form _ ions.

Determine the mass in grams of 1.15 × 10²³ atoms of cobalt.

Determine the correct number of protons and electrons in F ⁻ .

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