Element with symbol K:

## The reasoning The element with symbol **K** is **Potassium**. This comes from its Latin name *Kalium*. Many elements have symbols derived from their Latin or Greek names rather than their English names. This is why the symbol doesn't match the first letter of "Potassium." Here's the pattern: Scientists use Latin roots for historical consistency across all languages. So: - Potassium (Latin: *Kalium*) → **K** - Sodium (Latin: *Natrium*) → **Na** - Iron (Latin: *Ferrum*) → **Fe** ## Why the wrong options tempt you **A) Calcium** — Its symbol is actually **Ca** (starts with C, which matches!) **B) Krypton** — This noble gas uses **Kr** (two letters because K alone was taken) **D) Carbon** — Its symbol is **C** (straightforward match) The trap is assuming symbols always match the English name's first letter. They don't! ## Quick takeaway **K = Potassium** because of its Latin name *Kalium* — always remember the "K-alium connection" and you'll never mix this up with Calcium or Krypton again!