Mrs Roberts: What do you think you're made of? Mr Spellman: Big question. Grit, determination, hard-working, handsome, charming, funny. Mrs Roberts: Well, I guess. But you're actually made of atoms.

Atoms and molecules are the building blocks of matter. Various kinds of matter exist around us which are due to the different types of atoms and molecules present in them. Atoms are made up of three ...

This article presents the CBSE Class 9 Science notes on chapter 4 ‘Structure of the Atom’. These chapter notes are prepared by the subject experts and cover every important topic from the chapter. In ...

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Students use the terms isotope, atomic number, mass number, and atomic mass. Atomic Theory: Structure of the Atom: Students use the terms isotope, atomic number, mass number, and atomic mass to ...

IN a letter to this journal last week, Mr. Soddy has discussed the bearing of my theory of the nucleus atom on radio-active phenomena, and seems to be under the impression that I hold the view that ...