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1. Answer the following.
a. What is the difference in the atomic
models of Thomson and Rutherford?
b. What is meant by valency of an element?
What is the relationship between the
number of valence electron and valency?
c. What is meant by atomic
by atomic mass
number ? Explain how the atomic
number and mass number of carbon are
6 and 12 respectively.
d. What is
meant
by subatomic
particle ? Give brief information of three
subatomic particles with reference to
6.
alerspool honom
Answers
Ans:
1.Summary. J.J. Thomson's experiments with cathode ray tubes showed that all atoms contain tiny negatively charged subatomic particles or electrons. ... Rutherford's gold foil experiment showed that the atom is mostly empty space with a tiny, dense, positively-charged nucleus
2.Valency means combining capicity of an element . Relationship between the number of valence electrons and valency: Valence electrons are the number of electrons present in the outermost shell of an atom. Valency is the combing capicity of an element to form bonds with the other elements.
3.Atomic number of an element refers to the number of electrons or protons present in that element. ... Carbon has 6 protons, 6 electrons and 6 neutrons. So the atomic number is 6 as the number of protons is 6. The mass number is 12 as the sum of protons and neutrons is 12.Jul 23, 2018
4.The nucleus contains subatomic particles: protons and neutrons. Protons are positively-charged particles. Neutrons are neutral particles. Surrounding the nucleus is a cloud of very small subatomic particles called electrons. Electrons are negatively-charged particles.
Explanation:
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