Question:
Why is it called isotopes?
Answer:
The term “isotopes” comes from the Greek words “isos” meaning “equal” and “topos” meaning “place.”
It reflects the fact that isotopes of an element occupy the same place in the periodic table due to having the same number of protons.
Explanation
Origin of the Term “Isotopes”
- Greek Roots: “Isotopes” is derived from the Greek words “isos” (equal) and “topos” (place).
- Meaning: The name signifies that isotopes of an element share the same position or place in the periodic table.
Key Points
- Protons and Element Identity: Elements are defined by the number of protons in their atomic nuclei. All isotopes of an element have the same number of protons.
- Different Neutron Counts: Despite having the same number of protons, isotopes may have different numbers of neutrons, leading to variations in atomic mass.
Analogous Position in the Periodic Table
- Chemical Similarities: Isotopes exhibit similar chemical behavior because they have the same number of electrons and, therefore, similar electronic configurations.
- Position in the Table: As isotopes share the same number of protons, they are placed in the same position in the periodic table, reflecting their identical chemical properties.
Table of Hydrogen Isotopes
| Isotope | Protons | Neutrons | Example |
|---|---|---|---|
| Protium | 1 | 0 | Most common |
| Deuterium | 1 | 1 | Used in heavy water |
| Tritium | 1 | 2 | Radioactive |
More Important Questions on Isotopes
