Its atomic number.
atomic mass
the number of electrons that fill the outer shell
Formalization
The smallest unit of an element that maintains the properties of that element is the atom.
Vanadium is an element. Refer to the related link for a Wikipedia article on vanadium.
The atomic number
atomic mass
its atomic number There are there properties of an element to mass. The three properties are density, melting and electrical.
number of valence electrons
the number of electrons that fill the outer shell
copper
Selenium
Formalization
Position of Periodic Table describes chemical properties. it is estimated from its position in table.
The pace of a poem is most closely related to its rhythm. The rhythmic pattern created by stressed and unstressed syllables sets the pace and flow of the poem.
The smallest unit of an element that maintains the properties of that element is the atom.
The atom is the smallest unit of an element that has all the properties of the element.