Benchmark 2 Review 2425

Front

What type of bond forms between Beryllium (Be) and Fluorine (F)?

Back

Ionic bond: A bond formed when electrons are transferred from one atom to another, resulting in the formation of charged ions.

Front

How do you balance the equation H₂ + Cl₂ → HCl?

Back

Balanced equation: H₂ + Cl₂ → 2HCl. This shows that two molecules of hydrogen react with one molecule of chlorine to produce two molecules of hydrogen chloride.

Front

What type of reaction is represented by the equation 3Mg + N₂ → Mg₃N₂?

Back

Synthesis reaction: A type of chemical reaction in which two or more simple substances combine to form a more complex product.

Front

Which of the following is NOT a clue that a chemical reaction has taken place?

Back

Changing size: While physical changes can involve size changes, it is not a definitive indicator of a chemical reaction.

Front

Is wood burning a physical or chemical change?

Back

Chemical change: A process that results in the formation of new chemical substances.

Front

What is a chemical reaction?

Back

A process that involves the rearrangement of the molecular or ionic structure of a substance.

Front

What are the signs of a chemical reaction?

Back

Signs include color change, gas production, temperature change, and formation of a precipitate.

Front

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

Back

Physical change: A change that affects one or more physical properties of a substance without altering its chemical composition. Chemical change: A change that results in the formation of new chemical substances.

Front

What is a precipitate?

Back

A solid that forms and settles out of a liquid mixture during a chemical reaction.

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed; it is conserved.