Structure of Matter 2024

Front

What is the structure of an atom?

Back

An atom consists of a nucleus made of protons and neutrons, surrounded by electrons in energy levels.

Front

What are energy levels in an atom?

Back

Energy levels are regions around the nucleus where electrons are likely to be found, with each level holding a specific number of electrons.

Front

How many electrons can the first energy level hold?

Back

The first energy level can hold a maximum of 2 electrons.

Front

How many electrons can the second energy level hold?

Back

The second energy level can hold a maximum of 8 electrons.

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 the chemical formula for water?

Back

The chemical formula for water is H2O, indicating it has 2 hydrogen atoms and 1 oxygen atom.

Front

What is a crystal?

Back

A crystal is a solid structure whose atoms or molecules are arranged in a repeating, three-dimensional pattern.

Front

What is the difference between an element and a compound?

Back

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

Front

How many atoms are in one water molecule?

Back

There are 3 atoms in one water molecule (2 hydrogen and 1 oxygen).

Front

What is the atomic number?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.