what consists of elements combined in a specific ratio?
An ion.
Elements are composed of discrete units called atoms.
Elements are called the building blocks of matter because all matter is composed of elements.
A compound.
Elements can be combined in several different ways. Elements which undergo no chemical reactions when combined are called mixtures. Normally, the elements in a mixture retain their original properties, but metals can be combined into mixtures called alloys to produced new properties, though these properties tend to be the intermediate sum of the collective properties of the metals involved. Elements which combine chemically to produce entirely new substances are called chemical compounds.
A substance made of two or more elements chemically combined in a specific proportion is called a compound. A substance composed of two or more elements combined chemically in a fixed proportion by mass is called a compound. A chemical compound can be held together by a covalent bond or an ionic bond.
This is a chemical compound.
A molecule; the definition is: The smallest particle of a substance that retains the chemical and physical properties of the substance and is composed of two or more atoms; a group of like or different atoms held together by chemical forces.
Compound
Compound
A chemical reaction.
Elements are composed of only one type of atom. There are about 90 or so naturally occurring elements.
The framework of a cell in the cytoplasm is composed of thin fibrous elements. This network is called the cytoskeleton.
Two or more elements combined can become a compound.
compound
All elements are composed of extremely small particles called atoms. Atoms are composed of protons, neutrons, and electrons.
mixed economy