Explain the discovery of chargeless particles too-within an atom?

Which of the following rules could explain the presence of three unpaired electrons in N-atom?

Explain Bohr's model of atom?

Atoms of elements are made up mainly of protons, electrons and neutrons. a) Which of these particles are present in the nucleus of atoms? b) The discovery of which particle is related to the scientist .J. J. Thomson? c) Name the positively. charged particles? d) Name the scientist who proved that most of. the mass of an atom is concentrated in the nucleus?

"One mole of all substances contain the same number of specified particles." How to connect mole, gram mole and gram atom?

"One mole of all substances contain the same number of specified particles". a. Justify the statement. b. How to connect mole, gram atom and gram mole? c. What is the relation between mole and volume? d. Calculate the number of mole of a gas in i. 44.828L at STP ii. 11.207ml at STP

Rutherford's experiment on scattering of alpha - particles showed for the first time that the atom has:

Rutherford's experiment on scattering of alpha - particles showed for the first time that the atom has:

Which is the particle of an atom that has the possibility of changing of position, which can be exchanged when atoms rub against each other collide or chemically react with other atoms?

Which point does not pertain to electron in Bohr's model of atom? : Angular momentum is an integral multiple of h//(2pi) , The path of the electron within an atom is circular, Force of attraction of electron towards nucleus is balanced by centrifugal force, For a moving electron, energy changes continuously.