Isotopic mixture can be separated by physical methods.

1. Which isotope of hydrogen:
i) Does not contain a neutron?
ii) Is radioactive?
iii) Is heavy hydrogen?

2. Which isotope of hydrogen is used as a tracer in organic reactions?

3. What is heavy hydrogen? Write its two uses.

4. List all the possible isotopes of hydrogen with their symbol, mass number, the number of protons and neutrons in each, and their percentage abundances.

5. Which isotope of hydrogen contains an equal number of protons and neutrons?

Deuterium does not contain a neutron, tritium is used as a tracer in organic reactions, heavy hydrogen is deuterium, and tritium has equal protons and neutrons.

Explanation:

Deuterium (2H) does not contain a neutron and is also known as heavy hydrogen because it has one neutron in its nucleus, making it heavier than protium (1H), which only has a proton. The isotope of hydrogen used as a tracer in organic reactions is tritium (3H), which is radioactive.

Heavy hydrogen or deuterium is hydrogen with one proton and one neutron. It is used in chemical experiments as a non-radioactive label and in solvents for NMR. It is also utilized in nuclear reactors as a neutron moderator and coolant.

The possible isotopes of hydrogen are:

Protium (1H): 1 proton, 0 neutrons (99.98% abundance)
Deuterium (2H): 1 proton, 1 neutron (0.015% abundance)
Tritium (3H): 1 proton, 2 neutrons (trace levels)

Tritium (3H) is the isotope of hydrogen that contains an equal number of protons and neutrons.

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