A molecule.
An isotope of an element that is radioactive
The number of protons in the nucleus of each atom of the element.
it is the weighted average of the masses of an element's isotopes.
hepta
Symbol describes an element. It notates name of element.
A molecule.
An isotope of an element that is radioactive
An isotope of an element that is radioactive
element
The number of protons in the nucleus of each atom of the element.
An element is an item that belongs to a set.
anion
Texture
It is a 'term'
it is the weighted average of the masses of an element's isotopes.
it is the weighted average of the masses of an element's isotopes.