Study Guide for Chemistry Benchmark/Chemistry Unit Test

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is a compound?

Back

A compound is a substance formed when two or more elements chemically bond together in a fixed ratio.

Front

What happens during a chemical reaction?

Back

During a chemical reaction, reactants are transformed into products, often resulting in the formation of new substances.

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture that has a uniform composition throughout, meaning its components are evenly distributed.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a mixture where the components are not uniformly distributed, and different parts can be seen.

Front

What is the significance of group 16 in the periodic table?

Back

Group 16 contains elements that are vital for life, such as oxygen and sulfur, which play essential roles in biological processes.

Front

What is sodium chloride (NaCl)?

Back

Sodium chloride, commonly known as table salt, is a compound formed from the chemical reaction of sodium and chlorine.

Front

What is the role of oxygen in living organisms?

Back

Oxygen is essential for respiration in living organisms, allowing them to convert food into energy.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance that cannot be broken down into simpler substances, while a compound is made up of two or more elements chemically combined.

Front

What is an example of a chemical change?

Back

An example of a chemical change is the reaction between baking soda and vinegar, which produces carbon dioxide gas.