Question 1

The number of valence electrons of a representative element is related to which of the following?

Accepted Answer

A) atomic number 
B) atomic weight 
C) group number 
D) period number 
A) atomic number 
B) atomic weight 
C) group number 
D) period number

Question 2

Naturally occurring lithium (Li) consists of only two isotopes, Li-6 (6.02 amu) and Li-7 (7.02 amu), where the exact isotopic masses are given in parentheses. Use the periodic table and determine which isotope is present in the larger percentage in the natural element.

Accepted Answer

A)    
B)    
C) The percentage of each isotope is about the same. 
D) The relative percent abundance cannot be determined from the information available. 
A)    
B)    
C) The percentage of each isotope is about the same. 
D) The relative percent abundance cannot be determined from the information available.

Question 3

Electron shells define a region in space around the nucleus occupied by certain electrons.

Accepted Answer

A) True 
 B)False

Question 4

What is the mass of one mole of glucose, C6H12O6?

Accepted Answer

A) 29.02 amu 
B) 180.2 amu 
C) 29.02 g 
D) 180.2 g 
A) 29.02 amu 
B) 180.2 amu 
C) 29.02 g 
D) 180.2 g

Question 5

What is the mass of 3.71 mol diethyl ether, C4H10O?

Accepted Answer

A) 20.0 g 
B) 0.0501 g 
C) 74.1 g 
D) 275 g 
A) 20.0 g 
B) 0.0501 g 
C) 74.1 g 
D) 275 g

Question 6

Which of the following is true of the atomic weight of an element?

Accepted Answer

A) It is the weight of heaviest isotope. 
B) It is the weight lightest isotope. 
C) It is the weight of the most abundant isotope. 
D) It is an average obtained from the weights and abundances of the isotopes. 
A) It is the weight of heaviest isotope. 
B) It is the weight lightest isotope. 
C) It is the weight of the most abundant isotope. 
D) It is an average obtained from the weights and abundances of the isotopes.

Question 7

Compound consists of five atoms of carbon, ten atoms of hydrogen, and five atoms of oxygen. The formula for this compound is

Accepted Answer

A) CH2O. 
B) C10H5O10. 
C) C5H10O5. 
D) C5H10O10. 
A) CH2O. 
B) C10H5O10. 
C) C5H10O5. 
D) C5H10O10.

Question 8

The elements sodium, potassium, and oxygen are considered to be "elements of life" and are in the category of electrolytes.

Accepted Answer

A) True 
 B)False

Question 9

An element is a shiny gray solid that can be pressed into a thin sheet. This element is probably a metalloid.

Accepted Answer

A) True 
 B)False

Question 10

Which of the following correctly describes a proton on a subatomic scale?

Accepted Answer

A) It is massive and has a +1 charge. 
B) It is massive and has a -1 charge. 
C) It has very small mass and a +1 charge. 
D) It has a very small mass and a -1 charge. 
A) It is massive and has a +1 charge. 
B) It is massive and has a -1 charge. 
C) It has very small mass and a +1 charge. 
D) It has a very small mass and a -1 charge.

Question 11

Write the name of the following element.
Sn

Accepted Answer

The answer of Write the name of the following element.
Sn...

Question 12

Use the following terms to complete the two statements given. A term may be used more than once.
heterogeneous mixture
homogeneous mixture
compound
In a restaurant fresh ground pepper is added to olive oil as a dipping sauce for bread. This dip represents a_____________________. Coffee with caramel flavoring is served for dessert. The coffee is an example of a _______________________.

Accepted Answer

heterogene

Question 13

Which of the following is the Lewis structure for a nitrogen atom?

Accepted Answer

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

Question 14

Enter the chemical symbol in the blank for the element described given below.
Representative element in period 4 whose chemical behavior resembles that of O.
Symbol for the element:
_____________________

Accepted Answer

The answer of Enter the chemical symbol in the blank...

Question 15

In 22.99 g of Na there is 6.022 × 1023 atoms of Na.

Accepted Answer

A) True 
 B)False

Question 16

The electron arrangement for Na would be:
shell 1:2 electrons shell 2:8 electrons shell 3:1 electron

Accepted Answer

A) True 
 B)False

Question 17

A mole of an element contains the same number of atoms as a mole of any other element.

Accepted Answer

A) True 
 B)False

Question 18

Classify the following statement as representing an intensive or extensive property by placing intensive or extensive in the blank.
"Vinegar tastes sour.":
 _________________

Accepted Answer

The answer of Classify the following statement as representing an...

Question 19

The statement below describes an intensive property.   "The cost of this container of milk is $2.99/gal."

Accepted Answer

A) True 
 B)False

Question 20

Which of the following is a chemical substance than can be broken down into another substance?

Accepted Answer

A) element 
B) homogeneous mixture 
C) heterogeneous mixture 
D) compound 
A) element 
B) homogeneous mixture 
C) heterogeneous mixture 
D) compound

The number of valence electrons of a representative element is related to which of the following?

Naturally occurring lithium (Li) consists of only two isotopes, Li-6 (6.02 amu) and Li-7 (7.02 amu), where the exact isotopic masses are given in parentheses. Use the periodic table and determine which isotope is present in the larger percentage in the natural element.

Electron shells define a region in space around the nucleus occupied by certain electrons.

What is the mass of one mole of glucose, C₆H₁₂O₆?

What is the mass of 3.71 mol diethyl ether, C₄H₁₀O?

Which of the following is true of the atomic weight of an element?

Compound consists of five atoms of carbon, ten atoms of hydrogen, and five atoms of oxygen. The formula for this compound is

The elements sodium, potassium, and oxygen are considered to be "elements of life" and are in the category of electrolytes.

An element is a shiny gray solid that can be pressed into a thin sheet. This element is probably a metalloid.

Which of the following correctly describes a proton on a subatomic scale?

Write the name of the following element. Sn

Which of the following is the Lewis structure for a nitrogen atom?

Enter the chemical symbol in the blank for the element described given below. Representative element in period 4 whose chemical behavior resembles that of O. Symbol for the element: _____________________

In 22.99 g of Na there is 6.022 × 10²³ atoms of Na.

The electron arrangement for Na would be: shell 1:2 electrons shell 2:8 electrons shell 3:1 electron

A mole of an element contains the same number of atoms as a mole of any other element.

Classify the following statement as representing an intensive or extensive property by placing intensive or extensive in the blank. "Vinegar tastes sour.": _________________

The statement below describes an intensive property. "The cost of this container of milk is $2.99/gal."

Which of the following is a chemical substance than can be broken down into another substance?

Measurements in Science and Medicine

Chemical Bonds

Energy and Physical Properties

Solution Concentration

Chemical Reactions

Acids and Bases

Nuclear Chemistry

Hydrocarbons: An Introduction to Organic Molecules

Hydration, Dehydration, and Alcohols

Carbonyl Compounds and Redox Reactions

Organic Acids and Bases

Condensation and Hydrolysis Reactions

Proteins

Carbohydrates

Lipids and Membranes

Nucleic Acids, Protein Synthesis, and Heredity

Filters

Exam 2: Atoms, Elements, and Compounds

The number of valence electrons of a representative element is related to which of the following?

Naturally occurring lithium (Li) consists of only two isotopes, Li-6 (6.02 amu) and Li-7 (7.02 amu), where the exact isotopic masses are given in parentheses. Use the periodic table and determine which isotope is present in the larger percentage in the natural element.

Electron shells define a region in space around the nucleus occupied by certain electrons.

What is the mass of one mole of glucose, C6H12O6?

What is the mass of 3.71 mol diethyl ether, C4H10O?

Which of the following is true of the atomic weight of an element?

Compound consists of five atoms of carbon, ten atoms of hydrogen, and five atoms of oxygen. The formula for this compound is

The elements sodium, potassium, and oxygen are considered to be "elements of life" and are in the category of electrolytes.

An element is a shiny gray solid that can be pressed into a thin sheet. This element is probably a metalloid.

Which of the following correctly describes a proton on a subatomic scale?

Write the name of the following element. Sn

Which of the following is the Lewis structure for a nitrogen atom?

Enter the chemical symbol in the blank for the element described given below. Representative element in period 4 whose chemical behavior resembles that of O. Symbol for the element: _____________________

In 22.99 g of Na there is 6.022 × 1023 atoms of Na.

The electron arrangement for Na would be: shell 1:2 electrons shell 2:8 electrons shell 3:1 electron

A mole of an element contains the same number of atoms as a mole of any other element.

Classify the following statement as representing an intensive or extensive property by placing intensive or extensive in the blank. "Vinegar tastes sour.": _________________

The statement below describes an intensive property. "The cost of this container of milk is $2.99/gal."

Which of the following is a chemical substance than can be broken down into another substance?

Measurements in Science and Medicine

Chemical Bonds

Energy and Physical Properties

Solution Concentration

Chemical Reactions

Acids and Bases

Nuclear Chemistry

Hydrocarbons: An Introduction to Organic Molecules

Hydration, Dehydration, and Alcohols

Carbonyl Compounds and Redox Reactions

Organic Acids and Bases

Condensation and Hydrolysis Reactions

Proteins

Carbohydrates

Lipids and Membranes

Nucleic Acids, Protein Synthesis, and Heredity

Filters

What is the mass of one mole of glucose, C₆H₁₂O₆?

What is the mass of 3.71 mol diethyl ether, C₄H₁₀O?

In 22.99 g of Na there is 6.022 × 10²³ atoms of Na.