S8P1 Review

Front

What is a Lewis Dot Diagram?

Back

A Lewis Dot Diagram is a representation of the valence electrons of an atom, depicted as dots around the element's symbol.

Front

What does a heterogenous mixture mean?

Back

A heterogenous mixture is a combination of two or more substances that remain distinct and can be easily separated, such as salad or sand and salt.

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, such as melting or freezing.

Front

What is an example of a chemical change?

Back

An example of a chemical change is rust forming on iron, which alters the chemical composition of the iron.

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means, such as hydrogen or oxygen.

Front

What is the significance of valence electrons in an atom?

Back

Valence electrons determine how an atom can bond with other atoms and are crucial for understanding chemical reactions.

Front

What is the difference between a pure substance and a mixture?

Back

A pure substance has a uniform and definite composition, while a mixture contains two or more substances that retain their individual properties.

Front

What is an example of a homogenous mixture?

Back

An example of a homogenous mixture is saltwater, where the salt is evenly distributed throughout the water.

Front

What happens during evaporation?

Back

Evaporation is the process where liquid turns into vapor, demonstrating a physical change as the substance remains the same.

Front

What is the boiling point of water?

Back

The boiling point of water is 100 degrees Celsius (212 degrees Fahrenheit) at standard atmospheric pressure.