Chemical Reactions Test

Front

What is a dot diagram?

Back

A dot diagram, also known as a Lewis dot structure, represents the valence electrons of an atom. Each dot represents one valence electron.

Front

What is the balanced equation for the reaction of magnesium and oxygen?

Back

2 Mg + 1 O₂ → 2 MgO

Front

Why is Neon considered a noble gas?

Back

Neon is a noble gas because it has a full outer shell of 8 valence electrons, making it stable and nonreactive.

Front

What type of chemical reaction is represented by the equation AB → A + B?

Back

Decomposition reaction.

Front

How many HCl molecules are needed to balance the equation Mg + __ HCl → MgCl₂ + H₂?

Back

2 HCl molecules are needed.

Front

What is a chemical reaction?

Back

A chemical reaction is a process that involves the transformation of one or more substances into different substances.

Front

What are reactants in a chemical reaction?

Back

Reactants are the starting materials in a chemical reaction that undergo change.

Front

What are products in a chemical reaction?

Back

Products are the substances formed as a result of a chemical reaction.

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 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.