Clicker Questions: Friday, January 27
1) Which of the following statements is false?
A) Being soluble in water is a physical property of salt (as opposed to a chemical property).
B) Chemists use categories such as “pure substance” and “mixture” to classify matter.
C) The temperature at which any phase change occurs would be an example of a physical
property.
D) A bowl of cereal with milk would be a heterogeneous mixture.
E) Our definition of matter includes only inanimate objects (not living things).
2) Which of the following was the main topic you read about for today?
A) Homogeneous mixtures
E) Chemical changes
B) The periodic table
F) Molecular compounds
C) The metric system
G) Heat and temperature
D) Properties of solids
3) Which of the following statements is true?
A) Metalloids are the best conductors of electricity.
B) The noble gases are the most expensive elements, so historically, only nobility could afford
them.
C) The properties of the transition elements tend to be more predictable based on their
position in the PT than the main-group elements.
E) The original periodic table was used to predict the existence of undiscovered elements.
F) Each row within the periodic table is called a family or group of elements.
4) Based on what we have learned so far this semester, which of the following drawings is not an
appropriate room temperature representation of the element listed? Note: the box is the
container for that sample and each circle represents 1 atom of that element.
A) iron
B) helium
C) hydrogen
D) oxygen
E) copper
F) argon
Answers:
1) E
2) B
3) E
1
4) D