Front

What is a decomposition reaction?

Back

A decomposition reaction is a type of chemical reaction where one compound breaks down into two or more simpler products. Example: 2HI → H2 + I2.

Front

What is the name of the element with atomic number 18?

Back

Argon.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded. Example: Saltwater is a mixture of salt and water.

Front

What does the atomic number represent?

Back

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

Front

What are reactants in a chemical equation?

Back

Reactants are the starting substances in a chemical reaction, found on the left side of the equation.

Front

What is a synthesis reaction?

Back

A synthesis reaction is a type of chemical reaction where two or more simple substances combine to form a more complex product. Example: A + B → AB.

Front

What is a single replacement reaction?

Back

A single replacement reaction is a type of chemical reaction where one element replaces another in a compound. Example: A + BC → AC + B.

Front

What is a double replacement reaction?

Back

A double replacement reaction is a type of chemical reaction where two compounds exchange ions or bonds to form two new compounds. Example: AB + CD → AD + CB.

Front

What is the difference between a mixture and a compound?

Back

A mixture is a physical combination of substances that can be separated, while a compound is a chemical combination of elements that cannot be separated by physical means.

Front

What is the chemical symbol for Hydrogen?

Back

H.