Answer:
Element
Explanation:
Elements are seen as the building blocks of matter that cannot be broken down by simplier substances.
Dmitri Ivanovich Mendeleev was a Russian chemist and also an inventor. He is credited as being the creator of the first version of the periodic table of elements. He is predicted elements using the periodic table which are yet to be discovered.
Atoms are the smallest particle of an element.
Proton is a particle in the atom that has a positive charge.
Electron is a particle in the atom that has a negative charge
Neutron is a particle that has no charge and is in the atom
