Chemistry Semester 1 Review 2019

Front

What is a single replacement reaction?

Back

A single replacement reaction is a type of chemical reaction where one element replaces another element in a compound.

Front

Which element cannot be replaced by tin in a single replacement reaction?

Back

Magnesium cannot be replaced by tin because it is more reactive than tin.

Front

What is the definition of a cation?

Back

A cation is a positively charged ion that forms when an atom loses one or more electrons.

Front

What is the definition of an anion?

Back

An anion is a negatively charged ion that forms when an atom gains one or more electrons.

Front

What type of reaction involves the gain of electrons?

Back

Reduction is the type of reaction in which electrons are gained.

Front

What is the difference between oxidation and reduction?

Back

Oxidation involves the loss of electrons, while reduction involves the gain of electrons.

Front

What is a physical property?

Back

A physical property is a characteristic of a substance that can be observed or measured without changing its chemical composition.

Front

What is an example of a physical property?

Back

Water freezing at 0 degrees Celsius is an example of a physical property.

Front

What is a half-life?

Back

A half-life is the time required for half of the quantity of a radioactive isotope to decay.

Front

How much of a substance remains after one half-life?

Back

50% of the original substance remains after one half-life.