The number of protons. This is given by the atomic number.
number of protons
The difference is made by the number of protons, specifi for each element.
The difference is the number of neutrons contained in the atom's nucleus
Isotopes are the varying molecular weights of the atom caused by the addition or removal of neutrons.
Sodium is a metal atomic element. So it has no molecules (or whatsoever) in it. It is build up (like all elements) with a nucleus in the center and electrons 'rotating' in shells around it. The numbers and measures of those shells and the electrons therein differ from element to element. There are about 100 elements.
isotopes of a given element differ in the number of neutrons they have.
number of protons
The difference is made by the number of protons, specifi for each element.
Such atoms are isotopes and belong to the same element.
They are different words to describe the same thing. An atom is an element.
such forms of an elements are known as isotopes.
Yes, each element has a different number of protons.
An element is a pured substance and a pure substance is a material
Isotopes are forms of the same element that differ in Neutrons.
Minerals (other than elemental minerals) are combinations of elements.
No. Generally definition of an element refer to a group of atoms that have same number of protons and share same chemical properties and called isotopes of an element. Though weight of isotopes can differ representing difference in neutron number.
No, the isotopes of a single element differ in the no. of neutrons
no. elements are defined by their atomic number (the number of protons).