Deuterium and tritium are the isotopes of

Options

A. nitrogen
B. oxygen
C. hydrogen
D. helium

Answer

To determine the element of which deuterium and tritium are isotopes, we can follow these steps:

### Step 1: Understand the definition of isotopes
Isotopes are variants of a particular chemical element that have the same number of protons (atomic number) but different numbers of neutrons, resulting in different mass numbers.

### Step 2: Identify the atomic number of deuterium and tritium
Both deuterium and tritium are isotopes of hydrogen. The atomic number of hydrogen is 1, which means it has one proton.

### Step 3: Determine the mass numbers of deuterium and tritium
- Deuterium has a mass number of 2 (1 proton + 1 neutron).
- Tritium has a mass number of 3 (1 proton + 2 neutrons).

### Step 4: Conclude the element
Since both deuterium and tritium have the same atomic number (1), they are isotopes of hydrogen.

### Final Answer
Deuterium and tritium are isotopes of hydrogen.

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