chemistry fall exam review

Front

What is a double bond in chemistry?

Back

A double bond is a type of chemical bond where two pairs of electrons are shared between two atoms, resulting in a stronger bond than a single bond.

Front

How many double bonds are present in the Lewis structure of carbon dioxide (CO2)?

Back

Two.

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances, often accompanied by gas release, color change, or temperature change.

Front

What happens when sulfuric acid is combined with sugar?

Back

It undergoes a chemical change, releasing gas and forming a tall, black column.

Front

What is the composition of the nucleus of Rubidium-87?

Back

Rubidium-87 has 37 protons and 50 neutrons.

Front

What is atomic radius?

Back

Atomic radius is the distance from the nucleus of an atom to the outermost shell of electrons.

Front

How does atomic radius change across a period in the periodic table?

Back

Atomic radius decreases from left to right across a period due to increased nuclear charge pulling electrons closer.

Front

What is conductivity?

Back

Conductivity is the ability of a substance to conduct heat or electricity.

Front

What type of property is conductivity?

Back

Conductivity is an intensive property.

Front

What is an intensive property?

Back

An intensive property is a property that does not depend on the amount of substance present, such as density or boiling point.