Elements, compounds and mixtures Flashcards
What is an element?
An element is a pure substance that cannot be broken down into simpler substances by chemical means.
True or False: A compound is made up of two or more different types of atoms chemically bonded together.
True
Fill in the blank: A __________ is a combination of two or more substances that are not chemically bonded.
mixture
Which of the following is a compound? A) Oxygen B) Water C) Sodium
B) Water
What is the main difference between a mixture and a compound?
A mixture is a physical combination of substances, while a compound is a chemical combination of substances.
True or False: Mixtures can be separated by physical means.
True
Provide an example of an element.
Oxygen, Gold, or Iron.
What type of mixture has a uniform composition throughout?
A homogeneous mixture.
Multiple choice: Which of the following is NOT a characteristic of compounds? A) Fixed composition B) Can be physically separated C) Chemical bonding
B) Can be physically separated
What is a heterogeneous mixture?
A mixture that has a non-uniform composition and the individual components can be seen.
