Atoms, Elements, Compounds, & Molecules

Front

What is an atom?

Back

The smallest unit of matter that retains the properties of an element.

Front

What is an element?

Back

A pure substance that cannot be broken down into simpler substances by chemical means.

Front

What is a compound?

Back

A substance formed when two or more elements are chemically bonded together.

Front

What is a molecule?

Back

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

Front

How many elements are in the compound C6H12O6?

Back

3 (Carbon, Hydrogen, and Oxygen).

Front

Which of the following is a compound: Neon (Ne), Oxygen (O2), Carbon Dioxide (CO2), Nitrogen (N2)?

Back

Carbon Dioxide (CO2).

Front

Which of the following is not an element: Neon (Ne), Oxygen (O2), Carbon Dioxide (CO2), Iron (Fe)?

Back

Carbon Dioxide (CO2).

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of one type of atom, while a compound is made of two or more different types of atoms chemically bonded.

Front

What is the chemical formula for water?

Back

H2O (composed of 2 Hydrogen atoms and 1 Oxygen atom).

Front

What is the significance of the periodic table?

Back

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