Question

collect information regarding periodical development of fundamental particles and structure of atom

Answer 1

Everything we see around us, comes under two categories i.e, either it is made of compound or made of element. Elements are those which on breaking, the same element's atoms are found, whereas the compounds consists of more than one type of atom, or atoms of different elements.

      There are many elements, present and each of them are identified with their atomic number, which is defined in the periodic table. The atomic number of any element is determined by the number of electrons present around the nucleus.

Answer 2

Explanation:

• An Indivisible particle is called atom it is present all “living and non-living organisms”.

• Atom is the smallest unit of matter composed of a positively charged and placed in its center is called "nucleus", surrounding revolved some negatively charged particles are called “electrons”.

• Nucleus is small part of the atom that constitutes "protons" and "neutrons" particles that are strongly charged.  
• Protons have ‘positive charge and neutrons’ have neutral charge.

• And it consists of a cloud of “negatively charged electrons”. Electrons rotate around the nucleus orbit or center.
• The attractions between electrons and protons give the stability of an atom.