Counting Atoms, Heat transfer, and Ph/CH changes Review

Front

What is the definition of a subscript in a chemical formula?

Back

A subscript indicates the number of atoms of the element it follows in a chemical formula.

Front

How do you determine the number of atoms in a compound?

Back

Count the number of atoms represented by the elements and their subscripts in the chemical formula.

Front

What type of heat transfer occurs when you touch a hot stove?

Back

Conduction.

Front

What is the process of heat transfer through fluids (liquids and gases) called?

Back

Convection.

Front

What is radiation in terms of heat transfer?

Back

Radiation is the transfer of heat through electromagnetic waves, such as when microwaves heat food.

Front

What evidence indicates a chemical change has occurred?

Back

Evidence includes a change in color, formation of a gas, formation of a precipitate, or a strong odor.

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

Front

Is dissolving sugar in water a chemical or physical change?

Back

Physical change.

Front

What is the difference between a chemical change and a physical change?

Back

A chemical change results in the formation of new substances, while a physical change does not.

Front

What is an example of a chemical change?

Back

Burning wood, which produces ash and smoke.