Science Simplified

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Ohm’s Law is a fundamental principle in electricity that explains the relationship between voltage, current, and resistance in a circuit. It states that the current flowing through a conductor is directly proportional to the voltage across it and inversely proportional to its resistance, making it the foundation of electrical and electronic studies.

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Francium (Fr) is often thought to be the most expensive element, but in reality, it's not commercially available due to its extreme rarity and instability

1. Extremely Short Half-Life – The most stable isotope, Francium-223, has a half-life of only 22 minutes, meaning it decays almost instantly.

2. Impossible to Collect – At any given time, only a few atoms of francium exist naturally on Earth. It can only be synthesized in tiny amounts in labs.

3. No Commercial Use – Unlike californium-252, francium has no industrial or medical applications that would drive up its price.

Since francium can't be stored or sold, it's priceless rather than expensive. In contrast, californium-252 is synthesized and sold for millions per gram, making it the most expensive element in practice.