The substance in which one or more atoms have the same number of protons is called an element. Each element is defined by its unique number of protons, known as the atomic number. For example, all carbon atoms have six protons, categorizing them as carbon. Elements can exist as single atoms or as molecules consisting of two or more atoms of the same or different elements.
Element
Avogadro's number is important because it provides a way to relate the mass of a substance to the number of atoms or molecules it contains. It allows chemists to work with quantities of atoms or molecules in a more practical manner, making it easier to understand and predict the behavior of substances on a macroscopic scale.
The number of atoms in a liquid compared to a solid of the same substance remains the same; both states contain the same number of atoms. However, the arrangement and movement of these atoms differ: in solids, atoms are closely packed in a fixed structure, while in liquids, they are more loosely arranged and can move freely. Thus, the difference lies not in the number of atoms but in their spatial arrangement and energy levels.
The smallest unit of a pure substance that consists of two or more atoms held together by a chemical bond is a molecule.
A molecule is 2 or more atoms clinging together in some fashion. The molecule can be simple, that is, the same substance as the atoms, or it can be compound, that is, the atoms are different, and are of a different substance as the atoms.
Element
Element
An element is a substance in which all atoms have the same number of protons. Each element is identified by its unique number of protons, known as the atomic number.
No two elements have the same number of protons.
Element
Element
The smallest particle of a substance that retains all the properties of the substance and is composed of one or more atoms is called a molecule. Each molecule is made up of one or more atoms chemically bonded together.
Avogadro's number is important because it provides a way to relate the mass of a substance to the number of atoms or molecules it contains. It allows chemists to work with quantities of atoms or molecules in a more practical manner, making it easier to understand and predict the behavior of substances on a macroscopic scale.
A substance composed of two or more atoms of the same element is just a pure substance/element, a substance composed of different atoms is called a compound
The number of atoms in a liquid compared to a solid of the same substance remains the same; both states contain the same number of atoms. However, the arrangement and movement of these atoms differ: in solids, atoms are closely packed in a fixed structure, while in liquids, they are more loosely arranged and can move freely. Thus, the difference lies not in the number of atoms but in their spatial arrangement and energy levels.
The smallest unit of a pure substance that consists of two or more atoms held together by a chemical bond is a molecule.
It would be an atom or a molecule (made up of more than one atoms)