CHEM 103 FINAL EXAM STUDY GUIDE
QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS 100%
CORRECT RATED A+
An element is best described as a material
A)That has consistent chemical properties
B)Consisting of only one type of atom
C)That is pure
D)With more than one type of atom
E)That has consistent physical properties -ANSWER ✔✔that has consistent
chemical properties
The atomic symbol represents
A) The history of the element
B)the number of electrons in an atom of an element
C)The name of the element
D) All of the above
E) Only two of the above -ANSWER ✔✔Only two of the above
Which of the following physical properties would you expect from krypton
(Kr)?
A)a gas at room temperature
B)hard
C)shiny
D)conducts electricity
E)brittle -ANSWER ✔✔A gas at room temperature
, Which of the following elements is in the fourth period?
A)Chromium
B)Hydrogen
C)Carbon
D)Zirconium
E)Beryllium -ANSWER ✔✔Chromium
Which of the following is an example of a chemical change?
A)A piece of metal expanding when heated, but returning to it's original size
when cooled
B)breaking a glass window
C)water freezing into ice crystals
D)aftershave or perfume on your skin generating a smell
E)gasoline being used in the engine of a car producing exhaust -ANSWER
✔✔Gasoline being used in the engine of a car producing exhaust
What element is defined by the following information?
p+=17 n=20 e-=17
A)chlorine
B)oxygen
C)calcium
D)rubidium
E)neon -ANSWER ✔✔chlorine
The half-life of a carbon-14 is 2000 years. How long will it take 100g to
disintegrate to 125g?
A)2000 years
QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS 100%
CORRECT RATED A+
An element is best described as a material
A)That has consistent chemical properties
B)Consisting of only one type of atom
C)That is pure
D)With more than one type of atom
E)That has consistent physical properties -ANSWER ✔✔that has consistent
chemical properties
The atomic symbol represents
A) The history of the element
B)the number of electrons in an atom of an element
C)The name of the element
D) All of the above
E) Only two of the above -ANSWER ✔✔Only two of the above
Which of the following physical properties would you expect from krypton
(Kr)?
A)a gas at room temperature
B)hard
C)shiny
D)conducts electricity
E)brittle -ANSWER ✔✔A gas at room temperature
, Which of the following elements is in the fourth period?
A)Chromium
B)Hydrogen
C)Carbon
D)Zirconium
E)Beryllium -ANSWER ✔✔Chromium
Which of the following is an example of a chemical change?
A)A piece of metal expanding when heated, but returning to it's original size
when cooled
B)breaking a glass window
C)water freezing into ice crystals
D)aftershave or perfume on your skin generating a smell
E)gasoline being used in the engine of a car producing exhaust -ANSWER
✔✔Gasoline being used in the engine of a car producing exhaust
What element is defined by the following information?
p+=17 n=20 e-=17
A)chlorine
B)oxygen
C)calcium
D)rubidium
E)neon -ANSWER ✔✔chlorine
The half-life of a carbon-14 is 2000 years. How long will it take 100g to
disintegrate to 125g?
A)2000 years
