Question 1

Write the electron arrangement for the atom shown.
-The symbol for lead is ________.

Accepted Answer

Pb

Question 2

The metallic character of elements ________.

Accepted Answer

A) increases going across a period 
B) decreases going down within a group 
C) increases going down within a group 
D) does not change going down within a group 
E) none of the above 
A) increases going across a period 
B) decreases going down within a group 
C) increases going down within a group 
D) does not change going down within a group 
E) none of the above C

Question 3

Which of the following is a characteristic of the modern periodic table?

Accepted Answer

A) A group is a horizontal row on the periodic table. 
B) A period is a column on the periodic table. 
C) The elements in each group have similar chemical properties. 
D) The B groups contain the representative elements. 
E) The A groups contain the transition elements. 
A) A group is a horizontal row on the periodic table. 
B) A period is a column on the periodic table. 
C) The elements in each group have similar chemical properties. 
D) The B groups contain the representative elements. 
E) The A groups contain the transition elements. C

Question 4

Write the electron arrangement for the atom shown.
-The symbol for calcium is ________.

Accepted Answer

The answer of Write the electron arrangement for the atom...

Question 5

Consider a neutral atom with 30 protons and 34 neutrons.The mass number for this atom is ________.

Accepted Answer

A) 30 
B) 32 
C) 34 
D) 64 
E) 94 
A) 30 
B) 32 
C) 34 
D) 64 
E) 94

Question 6

The number of valence electrons found in an atom of a Group A element is equal to ________.

Accepted Answer

A) its atomic number 
B) its mass number 
C) its group number 
D) eight 
E) eight minus the group number 
A) its atomic number 
B) its mass number 
C) its group number 
D) eight 
E) eight minus the group number

Question 7

Semiconductors are located in the periodic table on (or in)the ________.

Accepted Answer

A) left side of the table 
B) right side of the table 
C) line dividing metals from nonmetals in the table 
D) first period of the table 
E) last period of the table 
A) left side of the table 
B) right side of the table 
C) line dividing metals from nonmetals in the table 
D) first period of the table 
E) last period of the table

Question 8

Sulfur has 16 valence electrons.

Accepted Answer

A) True 
 B)False

Question 9

Identify the noble gas in the following list.

Accepted Answer

A) helium 
B) nitrogen 
C) oxygen 
D) gold 
E) chlorine 
A) helium 
B) nitrogen 
C) oxygen 
D) gold 
E) chlorine

Question 10

Valence electrons are electrons located ________.

Accepted Answer

A) in the outermost energy level of an atom 
B) in the nucleus of an atom 
C) in the innermost energy level of an atom 
D) throughout the atom 
E) in the first three shells of an atom 
A) in the outermost energy level of an atom 
B) in the nucleus of an atom 
C) in the innermost energy level of an atom 
D) throughout the atom 
E) in the first three shells of an atom

Question 11

What is the mass number of an atom of potassium that has 20 neutrons?

Accepted Answer

A) 15 
B) 19 
C) 35 
D) 39 
E) 59 
A) 15 
B) 19 
C) 35 
D) 39 
E) 59

Question 12

The atomic mass of an element is equal to ________.

Accepted Answer

A) its mass number 
B) its atomic number 
C) one-twelfth of the mass of a carbon-12 atom 
D) the mass of an "average atom" 
E) the mass of the heaviest isotope 
A) its mass number 
B) its atomic number 
C) one-twelfth of the mass of a carbon-12 atom 
D) the mass of an "average atom" 
E) the mass of the heaviest isotope

Question 13

Potassium has one valence electron.

Accepted Answer

A) True 
 B)False

Question 14

Write the electron arrangement for the atom shown.
-Sodium

Accepted Answer

The answer of Write the electron arrangement for the atom...

Question 15

A lead atom with a mass number of 208 has 126 neutrons.

Accepted Answer

A) True 
 B)False

Question 16

Which element would have physical and chemical properties similar to chlorine?

Accepted Answer

A) Ar 
B) Br 
C) S 
D) O 
E) P 
A) Ar 
B) Br 
C) S 
D) O 
E) P

Question 17

Write the electron arrangement for the atom shown.
-The symbol for gold is Au.

Accepted Answer

A) True 
 B)False

Question 18

Consider a neutral atom with 30 protons and 34 neutrons.The number of electrons in this atom is ________.

Accepted Answer

A) 30 
B) 32 
C) 34 
D) 64 
E) 94 
A) 30 
B) 32 
C) 34 
D) 64 
E) 94

Question 19

What element has the electron arrangement 2,8,4?

Accepted Answer

A) carbon 
B) oxygen 
C) sulfur 
D) iron 
E) silicon 
A) carbon 
B) oxygen 
C) sulfur 
D) iron 
E) silicon

Question 20

The number of electrons in the outer energy level of a neutral atom of boron (atomic number 5)is ________.

Accepted Answer

A) 2 
B) 3 
C) 5 
D) 8 
E) 10 
A) 2 
B) 3 
C) 5 
D) 8 
E) 10

Write the electron arrangement for the atom shown. -The symbol for lead is ________.

The metallic character of elements ________.

Which of the following is a characteristic of the modern periodic table?

Write the electron arrangement for the atom shown. -The symbol for calcium is ________.

Consider a neutral atom with 30 protons and 34 neutrons.The mass number for this atom is ________.

The number of valence electrons found in an atom of a Group A element is equal to ________.

Semiconductors are located in the periodic table on (or in)the ________.

Sulfur has 16 valence electrons.

Identify the noble gas in the following list.

Valence electrons are electrons located ________.

What is the mass number of an atom of potassium that has 20 neutrons?

The atomic mass of an element is equal to ________.

Potassium has one valence electron.

Write the electron arrangement for the atom shown. -Sodium

A lead atom with a mass number of 208 has 126 neutrons.

Which element would have physical and chemical properties similar to chlorine?

Write the electron arrangement for the atom shown. -The symbol for gold is Au.

Consider a neutral atom with 30 protons and 34 neutrons.The number of electrons in this atom is ________.

What element has the electron arrangement 2,8,4?

The number of electrons in the outer energy level of a neutral atom of boron (atomic number 5)is ________.

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Exam 4: Atoms and Elements

Write the electron arrangement for the atom shown. -The symbol for lead is ________.

The metallic character of elements ________.

Which of the following is a characteristic of the modern periodic table?

Write the electron arrangement for the atom shown. -The symbol for calcium is ________.

Consider a neutral atom with 30 protons and 34 neutrons.The mass number for this atom is ________.

The number of valence electrons found in an atom of a Group A element is equal to ________.

Semiconductors are located in the periodic table on (or in)the ________.

Sulfur has 16 valence electrons.

Identify the noble gas in the following list.

Valence electrons are electrons located ________.

What is the mass number of an atom of potassium that has 20 neutrons?

The atomic mass of an element is equal to ________.

Potassium has one valence electron.

Write the electron arrangement for the atom shown. -Sodium

A lead atom with a mass number of 208 has 126 neutrons.

Which element would have physical and chemical properties similar to chlorine?

Write the electron arrangement for the atom shown. -The symbol for gold is Au.

Consider a neutral atom with 30 protons and 34 neutrons.The number of electrons in this atom is ________.

What element has the electron arrangement 2,8,4?

The number of electrons in the outer energy level of a neutral atom of boron (atomic number 5)is ________.

Chemistry in Our Lives

Chemistry and Measurement

Matter and Energy

Nuclear Chemistry

Ionic and Molecular Compounds

Chemical Quantities and Reactions

Gases

Solutions

Acids and Bases and Equilibrium

Introduction to Organic Chemistry: Hydrocarbons

Alcohols, thiols, ethers, aldehydes, and Ketones

Carbohydrates

Carboxylic Acids, esters, amines, and Amides

Lipids

Amino Acids, proteins, and Enzymes

Nucleic Acids and Protein Synthesis

Metabolic Pathways and Energy Production

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