Examlex
Isotopes differ from each other only in the number of electrons the atom contains.
Itchy Eyes
A sensation that leads to the desire to rub the eyes, often caused by allergies, infections, or dryness.
Common Cold
A viral infection of the nose and throat, which is minor and self-limiting, characterized by sneezing, coughing, and a runny nose.
Influenza
A contagious respiratory illness caused by influenza viruses, characterized by fever, cough, and muscle aches.
Allergy
An immune system response that occurs when the body mistakenly identifies a normally harmless substance as a threat.
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