Tab 8/C - Chemistry

Front

What is decomposition in chemistry?

Back

Decomposition is a type of chemical reaction where a single compound breaks down into two or more simpler products.

Front

What determines how an element reacts chemically?

Back

The number of electrons in the outer valence layer of an element determines its chemical reactivity and whether it can conduct electricity.

Front

Is helium a reactive element? Why or why not?

Back

No, helium is not reactive because it has a full outer shell of electrons (two in its 'S' orbital), making it stable.

Front

What are acid-base reactions?

Back

Acid-base reactions are a type of chemical reaction that involves the transfer of protons (H+) between reactants.

Front

What does the atomic number of an element represent?

Back

The atomic number of an element represents the number of protons in the nucleus of an atom, which also equals the number of electrons in a neutral atom.

Front

What is a chemical reaction?

Back

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.

Front

What is the significance of valence electrons?

Back

Valence electrons are important because they determine how an atom can bond with other atoms and its overall chemical behavior.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance that cannot be broken down into simpler substances, while a compound is made up of two or more elements chemically bonded together.

Front

What is an example of a decomposition reaction?

Back

An example of a decomposition reaction is the breakdown of water (H2O) into hydrogen (H2) and oxygen (O2) gas.

Front

What is the role of protons in determining an element's identity?

Back

Protons determine an element's identity because the number of protons defines the element and its position on the periodic table.