Compare the properties of electrons, protons and neutrons. - Science

Question

Compare the properties of electrons, protons and neutrons.

Answer

Property	Electron	Proton	Neutron
Symbol	$e^-$	$p^+$	$n$
Charge	Negative (-1.6 $\times$ $10^{-19}$ C)	Positive (+1.6 $\times$ $10^{-19}$ C)	No Charge (Neutral)
Relative Mass	Negligible (approx. $\frac{1}{1840}$ u)	1 u	1 u
Location	Outside the nucleus (in shells)	Inside the nucleus	Inside the nucleus

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On the basis of Thomson's model of an atom, explain how the atom is neutral as a whole.

On the basis of Rutherford's model of an atom, which sub-atomic particle is present in the nucleus of an atom?

Draw a sketch of Bohr's model of an atom with three shells.

4. What do you think would be the observation if the $\alpha$ -particle scattering experiment is carried out using a foil of a metal other than gold?

Name the three sub-atomic particles of an atom.

Helium atom has an atomic mass of 4 u and two protons in its nucleus. How many neutrons does it have?

Write the distribution of electrons in carbon and sodium atoms.

If K and L shells of an atom are full, then what would be the total number of electrons in the atom?

Subject: Science
Class: class 9
Chapter 4: Structure of the Atom
Medium: English Medium