It is 2.
Compounds consist of at least 2 elements.
Two.
Hydrogen is the first, smallest, and lightest element. It is number 1 in the periodic table of elements.
Elements are made of atoms. The atom is the smallest single unit that exists in any type of element and their number varies in the elements.
Hydrogen is a non metal element. Atomic number of it is 1.
An atom is the smallest piece of an element. Said another way, and element is made up one and only one kind of atoms.
Hydrogen
How are elements and atoms related? An element is a substance that contains only a single type of atom. The number of atoms is not important as long as all the atoms are of the same type. You cannot separate an element into other substances..... there are as many elements as atoms - more them 100.
The solid element with the lowest atomic number is lithium, with an atomic number of 3.
Atoms are the smallest particle of matter. Each has a nucleus of protons and neutrons surrounded by electrons. An element is an atom with a particular atomic number, that is, a certain number of protons. Each element has a different number of protons. A compound is something formed by two or more atoms.
Hydrogen is a gas element. It had the smallest atomic number.
Number of protons PLUS number of valence electrons (plus - if needed - number of electrons in inner shell).
Scandium. Its atomic number is 21. It is the first d block element.
A chemical element is the smallest component of matter characterized by a specific number of protons.