Such a substance is especially called a compound.
It is a binary compound
A compound is composed of different kinds of atoms that are covalently bonded together. Compounds are made up from atoms of different elements.
No it isn't. An element is one kind of atom, it is not made of different kinds of atoms.
hydrogen, carbon, nitrogen, oxygen, and sulfur are the kinds of atoms always present in protein molecules
Two or more different elements that are chemically combined in a definite ratio is a compound. Based on the nature of the bonds, it can be called an ionic compound (i.e. atoms bonded together by ionic bonds) or an molecular compound (i.e. atoms bonded together by covalent bonds).
a compound
A pure substance is something like just water (H2O). A homogeneous mixture is a solution with multiple compounds. These mostly contain water, but not always. An example of a homogeneous mixture is H2O+NaCl or NaCl (aq).
It is a binary compound
A compound is composed of different kinds of atoms that are covalently bonded together. Compounds are made up from atoms of different elements.
No it isn't. An element is one kind of atom, it is not made of different kinds of atoms.
No. Atoms are the building blocks of matter. Each element is composed of the same kind of atoms, according to their number of protons (atomic number). Molecules are composed of two or more atoms (they may be the same element or different elements), and compounds are composed of two or more kinds of atoms.
molecules
The atoms of an element are all identical.
hydrogen, carbon, nitrogen, oxygen, and sulfur are the kinds of atoms always present in protein molecules
Sulfur (also spelled Sulphur) is an element so it is composed only of atoms of Sulfur.
An element is composed of only one kind of atom. A compound is composed of two or more elements (kinds of atoms) chemically combined.
Two or more different elements that are chemically combined in a definite ratio is a compound. Based on the nature of the bonds, it can be called an ionic compound (i.e. atoms bonded together by ionic bonds) or an molecular compound (i.e. atoms bonded together by covalent bonds).