PS Midterm

Front

What is a compound?

Back

A compound is a substance formed when two or more elements chemically bond together in a fixed ratio.

Front

Which of the following is not a compound: Cl, HCl, NaCl, CO2?

Back

Cl is not a compound; it is an element.

Front

What is the general formula for a Single Replacement reaction?

Back

A + CD -> C + AD.

Front

Back

This is a Decomposition reaction.

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture that appears to be evenly mixed throughout.

Front

What is the octet rule?

Back

The octet rule states that most elements want to have 8 valence electrons.

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 difference between a homogeneous mixture and a heterogeneous mixture?

Back

A homogeneous mixture has a uniform composition, while a heterogeneous mixture has a non-uniform composition.

Front

What is the definition of valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical bonding.

Front

What is a decomposition reaction?

Back

A decomposition reaction is a type of chemical reaction where one compound breaks down into two or more simpler substances.