14 Questions
Which of the following is NOT a characteristic of atoms?
They can be further divided into smaller particles
In the image of the copper penny, what do the brown spheres represent?
Copper atoms
What is the ratio of copper atoms to oxygen atoms in the compound copper(II) oxide?
1:1
Which of the following statements about phase changes is NOT true?
The particles themselves change into different elements
Who are the primary contributors to the development of the modern Periodic Table?
Dmitri Ivanovich Mendeleev and Julius Lothar Meyer
What is the primary purpose of a beaker?
To mix, stir, and heat chemicals
What additional equipment is typically used when heating a liquid in a beaker?
Tripod, Bunsen burner, and wire gauze
What is the primary function of a stirring rod?
To stir solutions and transfer liquid
Which of the following is a characteristic of an Erlenmeyer flask?
All of the above
What is the primary purpose of a Florence flask?
To hold liquids and can be easily swirled and heated
What is the key difference between a test tube and a Florence flask?
Test tubes have one end open and the other end closed, while Florence flasks have a round bottom and a long neck
What is the primary purpose of a test tube brush?
To clean and narrow mouth glassware such as cylinders, burettes, and flasks
What is the proper way to handle a test tube containing a substance?
Never point the open end of the test tube at yourself or others
Which of the following laboratory glassware is used to accurately measure the volume of liquids?
Graduated cylinder
Test your knowledge on ionization energy and atomic radius concepts. Understand the definitions of first and second ionization energies, and how effective nuclear charge impacts the atomic radius. Learn about the relationship between electron shielding and nuclear attraction.
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