Question

the atomic number and mass number of an element are 4 and 9 respectively
a) what is number of protons?
b) how many electrons are present?
c) how many neutrons are present?
d) draw the geometrical model of the atom?​

Answer 1

Answer:

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Explanation:

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Answer 2

Answer:

atom contains 11 protons, 11 electrons, 12 neutrons