1.

(a) Describe Thomson's model of the atom. Which subatomic particle was not present in Thomson's model of the atom? (b) The mass number of an element is 18. It contains 7 electrons. What is the number of protons and neutrons in it? What is the atomic number of the element?

Answer»

(a) Describe Thomson's model of the atom. Which subatomic particle was not present in Thomson's model of the atom?
(b) The mass number of an element is 18. It contains 7 electrons. What is the number of protons and neutrons in it? What is the atomic number of the element?



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