Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. Examples include boiling, cutting, and grinding.

Front

Which of the following is NOT a physical change?

Back

Burning is NOT a physical change; it is a chemical change.

Front

What are alkali metals?

Back

Alkali metals are a group of elements in Group 1 of the periodic table, known for being highly reactive and having one electron in their outermost shell. Examples include Lithium, Sodium, and Potassium.

Front

Which element is NOT an alkali metal?

Back

Gold is NOT an alkali metal.

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: NH3 + HCl → NH4Cl.

Front

What is a single displacement reaction?

Back

A single displacement reaction is a type of chemical reaction where one element replaces another in a compound. Example: 3Ca + 2AlCl3 → 3CaCl2 + 2Al.

Front

What is a decomposition reaction?

Back

A decomposition reaction is a type of chemical reaction where a single compound breaks down into two or more simpler products. Example: 2H2O → 2H2 + O2.

Front

What is a double displacement reaction?

Back

A double displacement 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 are ionic solids?

Back

Ionic solids are compounds composed of ions held together by ionic bonds. They typically have high melting points due to the strong electrostatic forces between the ions.

Front

What is the melting point of ionic solids?

Back

Ionic solids have a high melting point.