Atoms, Elements, Molecules, Compounds

Front

What are elements?

Back

Elements are pure substances that cannot be broken down into simpler substances by chemical means. They consist of only one type of atom.

Front

List four examples of elements.

Back

Oxygen (O), Nitrogen (N), Hydrogen (H), Calcium (Ca).

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together, which can be of the same or different elements.

Front

What is a compound?

Back

A compound is a substance formed when two or more different elements are chemically bonded together.

Front

What does the stick represent in a ball and stick model?

Back

The stick represents the attraction between atoms, indicating how they are bonded.

Front

What is the difference between a molecule and a compound?

Back

A molecule can consist of the same or different types of atoms, while a compound specifically consists of two or more different types of atoms.

Front

What are the unique physical and chemical properties of an element?

Back

Elements have distinct properties that define their behavior in chemical reactions and physical interactions, which cannot be altered by chemical means.

Front

Why are models used in science?

Back

Models are used to represent and simplify complex systems or concepts, making them easier to understand and study.

Front

Are models perfect representations of the things they depict? Why or why not?

Back

No, models are not perfect representations because they have limitations and can only effectively represent certain aspects of the real thing.

Front

What is the significance of the periodic table?

Back

The periodic table organizes all known elements based on their atomic number, electron configuration, and recurring chemical properties.