Interpretation:
The table of properties of chlorine and zirconium is to be completed.
Concept introduction:
Where,
Answer to Problem 72A
Element | Cl | Cl | Zr | Zr |
Atomic number | 17 | 17 | 40 | 40 |
Mass number | 35 | 37 | 90 | 92 |
Protons | 17 | 17 | 40 | 40 |
Neutrons | 18 | 20 | 50 | 52 |
Electrons | 17 | 17 | 40 | 40 |
Explanation of Solution
In the given table, isotopes of Chlorine and Zirconium Elements are given.
Thus, Atomic number will be same and Mass number will be different for isotopes of same element.
Chlorine atom with Mass number 35
Chlorine atom with Mass number 37
Zirconium atom with 50 neutrons
Zirconium atom with mass number 92
Number of neutrons = Mass number − Atomic number
= 92 − 40
= 52
Thus,
Element | Cl | Cl | Zr | Zr |
Atomic number | 17 | 17 | 40 | 40 |
Mass number | 35 | 37 | 90 | 92 |
Protons | 17 | 17 | 40 | 40 |
Neutrons | 18 | 20 | 50 | 52 |
Electrons | 17 | 17 | 40 | 40 |
Isotopes of an element have same number of protons and electrons but different number of neutrons.
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Chemistry: Matter and Change
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