lOMoAR cPSD| 6861666
CHEM 280 Mock Exam II - Practice Exam
Questions and Answers 100% Correct | New
2026 | Graded A+
correct answers to the multiple-choice questions are provided at the end
Mock Exam II
1) Pb is the symbol for ________.
A) lead
B) silver
C) plumbium
D) potassium
E) mercury
2) Select the correct symbol for the element potassium.
A) P
B) Po
C) Pt
D) K
E) Ko
3) What elements are in hydroxyapatite, OH, a major compound in human bones and
teeth?
A) carbon, potassium, oxygen, hydrogen
B) calcium, phosphorous, oxygen, hydrogen
C) carbon, phosphorous, oxygen, helium
D) calcium, phosphorous, oxygen, helium
E) carbon, potassium, oxygen, helium
4) Which of the following properties is not a characteristic of the Group 1A (1) elements (alkali
metals)?
A) They are shiny.
B) They are good conductors of heat.
C) They react vigorously with water.
D) Most of them are liquids at room temperature.
E) They are good conductors of electricity.
5) The Group 8A (18) elements ________.
, lOMoAR cPSD| 6861666
A) are unreactive and are rarely found in combination with other elements
B) are good conductors of electricity
C) melt at high temperatures
D) are liquids at room temperature
E) react vigorously with water
6) Which of the following elements is a metal?
A) nitrogen
B) fluorine
C) argon
D) strontium
E) phosphorus
7) Which of the following elements is a metalloid?
A) nitrogen
B) lithium
C) iron
D) gold
E) silicon
8) The elements lithium, sodium, and potassium ________.
A) are isotopes of each other
B) are in the same period of elements
C) have the same number of neutrons
D) are in the same group
E) have the same mass number
9) Which element would have physical and chemical properties similar to chlorine?
A) Ar
B) Br
C) S
D) O E) P
10) What is the symbol of the element in Group 4A (14) and Period 2?
A) Be
B) Mg
C) Ca
D) C
CHEM 280 Mock Exam II - Practice Exam
Questions and Answers 100% Correct | New
2026 | Graded A+
correct answers to the multiple-choice questions are provided at the end
Mock Exam II
1) Pb is the symbol for ________.
A) lead
B) silver
C) plumbium
D) potassium
E) mercury
2) Select the correct symbol for the element potassium.
A) P
B) Po
C) Pt
D) K
E) Ko
3) What elements are in hydroxyapatite, OH, a major compound in human bones and
teeth?
A) carbon, potassium, oxygen, hydrogen
B) calcium, phosphorous, oxygen, hydrogen
C) carbon, phosphorous, oxygen, helium
D) calcium, phosphorous, oxygen, helium
E) carbon, potassium, oxygen, helium
4) Which of the following properties is not a characteristic of the Group 1A (1) elements (alkali
metals)?
A) They are shiny.
B) They are good conductors of heat.
C) They react vigorously with water.
D) Most of them are liquids at room temperature.
E) They are good conductors of electricity.
5) The Group 8A (18) elements ________.
, lOMoAR cPSD| 6861666
A) are unreactive and are rarely found in combination with other elements
B) are good conductors of electricity
C) melt at high temperatures
D) are liquids at room temperature
E) react vigorously with water
6) Which of the following elements is a metal?
A) nitrogen
B) fluorine
C) argon
D) strontium
E) phosphorus
7) Which of the following elements is a metalloid?
A) nitrogen
B) lithium
C) iron
D) gold
E) silicon
8) The elements lithium, sodium, and potassium ________.
A) are isotopes of each other
B) are in the same period of elements
C) have the same number of neutrons
D) are in the same group
E) have the same mass number
9) Which element would have physical and chemical properties similar to chlorine?
A) Ar
B) Br
C) S
D) O E) P
10) What is the symbol of the element in Group 4A (14) and Period 2?
A) Be
B) Mg
C) Ca
D) C
