A fundamental substance that cannot be chemically decomposed into simpler substances, constituting the basic building blocks of matter in the universe, with 92 naturally occurring elements identified.
In the context of philosophy, it refers to a constant and unchanging component that serves as the essence of all things, such as the four elements (earth, air, fire, water) in Greek philosophy or their equivalents in other traditions.
A type of material defined by its unique atomic number, representing the concept of atomic diversity rather than specific physical substances; while often used interchangeably with "simple substance," it denotes the category of atomic types recognized in chemical science.
Example:
元素記号Ｈは水素をあらわす。
A comprehensive term for elements that can form metals in their elemental state, categorized into groups such as alkaline metals, alkaline earth metals, transition metals, and noble metals based on their properties.
Elements characterized by their ability to conduct electricity and heat, typically exhibiting luster and malleability, which are grouped according to specific chemical properties and behaviors.
Elements that have a metallic nature, which encompasses a variety of groups distinguished by their physical and chemical characteristics, influencing their uses in industrial and technological applications.
A symbolic representation used in chemistry to denote the specific types of atoms present in an element, typically consisting of one or two letters derived from the element's name in various languages.
A notational system established in the early 19th century to identify elements in chemical reactions, allowing scientists to succinctly convey the composition of compounds.
An alphanumeric character or set of characters that uniquely identifies chemical elements in periodic tables, formulas, and equations, facilitating communication within the scientific community.
古代の哲学や自然観において、すべての物質が構成される基本的な要素として考えられている四つの元素、すなわち火、土、空気、水を指す。
自然界における四つの根本的な要素であり、それぞれが相互に作用し合っているとされ、古代ギリシャの思想に深く根ざした概念である。
異なる文化や伝統において物事の成り立ちや変化を説明するために用いられる、火、土、空気、水という四つのエレメントの総称。
化学の基本的な構成要素である元素を、原子番号や性質に基づいて整理した表。
各元素の相対的な位置関係と周期的な性質を示し、元素間の関連性を探るための科学的なツール。
原子の構造や化学的特性を理解するために、元素を視覚的に表現した体系的なアプローチ。