PS1-2 Matter Assessment Review

Front

What is the arrangement of atoms for one nitrogen atom bonded to three hydrogen atoms?

Back

The arrangement is a nitrogen atom (N) at the center with three hydrogen atoms (H) bonded to it, forming a trigonal pyramidal shape.

Front

What type of chemical reaction evidence is indicated by the formation of a solid from a solution?

Back

Formation of precipitate.

Front

What does the equation 2HCl --> H2 + Cl2 represent?

Back

It represents a chemical reaction where hydrochloric acid (HCl) decomposes into hydrogen gas (H2) and chlorine gas (Cl2).

Front

What is the melting point?

Back

The melting point is the temperature at which a substance changes from a solid to a liquid.

Front

What type of chemical reaction evidence is indicated by the release of gas?

Back

Gas produced.

Front

What is a chemical reaction?

Back

A chemical reaction is a process where substances (reactants) are transformed into different substances (products) through the breaking and forming of chemical bonds.

Front

What is the boiling point?

Back

The boiling point is the temperature at which a liquid turns into vapor.

Front

What is a reactant?

Back

A reactant is a substance that undergoes a chemical change in a reaction.

Front

What is a product in a chemical reaction?

Back

A product is a substance that is formed as a result of a chemical reaction.

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.