Molecules and Extended Structures

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together, representing the smallest fundamental unit of a chemical compound.

Front

What is an extended structure?

Back

An extended structure is a large network of atoms or molecules that are bonded together in a repeating pattern, such as in crystals.

Front

What is the atomic mass of an element?

Back

The atomic mass is the weighted average mass of an element's isotopes, measured in atomic mass units (amu). For example, the atomic mass of hydrogen is approximately 1.008 amu.

Front

What is the building block of all matter?

Back

The building block of all matter is the atom, which is the smallest unit of an element that retains its chemical properties.

Front

What is the relationship between protons and atomic number?

Back

The atomic number of an element is equal to the number of protons in its nucleus.

Front

How many atoms are in a single molecule of water (H2O)?

Back

A single molecule of water contains three atoms: two hydrogen atoms and one oxygen atom.

Front

What is a diatomic molecule?

Back

A diatomic molecule is a molecule composed of two atoms, which can be of the same or different elements, such as O2 (oxygen) or CO (carbon monoxide).

Front

What is a simple molecule?

Back

A simple molecule is a molecule that consists of a small number of atoms, typically two or three, such as H2 (hydrogen) or CO2 (carbon dioxide).

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means, and it is made up of only one type of atom.

Front

What is a chemical bond?

Back

A chemical bond is the force that holds atoms together in a molecule, which can be ionic, covalent, or metallic.