Chapter 4: Structure of the Atom

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Q
Structure of Atom

Question:

Complete the following table.

Answer:

The atomic number of the element is equal to the number of protons present in the nucleus of the atom. The number of protons is equal to the number of electrons present in the atom.

Atomic number (Z)= Number of Protons = Number of Electrons

The mass number is defined as the total number of nucleons, which is the total number of protons and neutrons present in the nucleus of the atom.

Mass number(A)= Number of Protons + Number of Neutrons

The atomic number of the given element is 9. So, it contains 9 protons and electrons. The name of the element is Fluorine. Its mass number will be 9+10=19.

The atomic number of the given element is 16 and mass number is 32. So, it contains 16 protons and electrons. The name of the element is Sulphur. The number of neutrons will be 32-16=16.

The number of protons of the given element is 12 and its mass number is 24. So, it contains 12 electrons and its atomic number is 12. The name of the element is Magnesium. The number of neutrons will be 24-12=12.

The number of protons of the given element is 1 and its mass number is 2. So, it contains 1 electron and its atomic number is 1. The name of the element is Hydrogen. The number of neutrons will be 2-1=1

The mass number of the given element is 1. It contains 0 neutrons and 1 proton. So, its atomic number is 1. It contains zero electron. Hence, it is a protium (isotope of hydrogen).

 


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