Chemistry Review

Front

What are the reactants in the chemical reaction of water formation?

Back

Hydrogen and oxygen are the reactants that combine to form water.

Front

Who is known for formulating the Periodic Law?

Back

Dmitri Mendeleev is credited with the formulation of the Periodic Law.

Front

What property of a metal can best help identify it?

Back

Density is a key property that can help identify a metal.

Front

Which of the following is NOT a chemical reaction?

Back

Silver molded into a necklace is a physical change, not a chemical reaction.

Front

On a phase change graph, where does the energy increase while the temperature remains constant?

Back

The energy increases at point D on the phase change graph.

Front

What is a chemical reaction?

Back

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.

Front

What is the periodic table?

Back

The periodic table is a tabular arrangement of chemical elements, organized by their atomic number, electron configuration, and recurring chemical properties.