Atomic Mass
Definition:
Atomic mass is a noun used in chemistry. It refers to the mass of a single atom of a chemical element, measured in atomic mass units (amu). Each element has a specific atomic mass that helps scientists understand how much matter is in the atom.
Usage Instructions:
When you talk about atomic mass, you usually mention it in the context of chemistry, especially when discussing elements in the periodic table or when calculating chemical reactions.
Example:
- The atomic mass of carbon is approximately 12.01 amu. This means that one atom of carbon weighs about 12.01 times the mass of a hydrogen atom.
Advanced Usage:
In more advanced chemistry, atomic mass can be used to determine the relative abundance of isotopes (different versions of the same element with different numbers of neutrons). For example, the atomic mass of chlorine reflects both its isotopes, chlorine-35 and chlorine-37.
Word Variants:
- Atomic: Adjective form that describes something related to atoms. For example, "atomic structure" refers to the arrangement of atoms in a molecule. - Mass: Can also mean the quantity of matter in an object, not limited to atomic contexts.
Different Meaning:
In a different context, "mass" can refer to a large body of matter (as in a mass of people) or a religious ceremony (like a Catholic Mass).
Synonyms:
- Atomic weight (though "atomic mass" is more commonly used in modern contexts) - Isotopic mass (when referring specifically to the mass of isotopes)
Idioms and Phrasal Verbs:
There are no specific idioms or phrasal verbs that directly relate to "atomic mass," as it is a specialized term. However, in science, you might encounter phrases like "weigh in" (to contribute to a discussion or debate), but this is not directly related to chemistry.
Summary:
Atomic mass is essential in understanding the properties of elements in chemistry.