K is the abbreviation for calcium.
A True
B False
The Correct Answer and Explanation is :
The correct answer is B. False.
The abbreviation for calcium is not K. Instead, Ca is the chemical symbol for calcium, which comes from the Latin word calx, meaning “lime.” The periodic table of elements assigns symbols to each element, and these symbols are typically one or two letters long. For example, K is the symbol for potassium, not calcium.
Here’s why:
- Periodic Table Symbols: The periodic table assigns unique symbols to chemical elements, typically derived from their English or Latin names. Calcium, which has the atomic number 20, is symbolized as Ca, following the general pattern of using the first letter of the element’s name, with a second letter to distinguish it from other elements.
- K for Potassium: The symbol K is used for potassium. This might be confusing because the letter K is not the first letter of “potassium.” However, K comes from the element’s Latin name kalium, which has roots in Arabic, and was historically used to refer to potash, from which potassium was first extracted.
- Naming Conventions: The use of K for potassium and Ca for calcium follows the pattern of assigning symbols based on historical, linguistic, or geographical reasons. This can sometimes lead to non-intuitive choices, such as Fe for iron (from ferrum, its Latin name) or Na for sodium (from natron, its Latin name for soda).
In summary, Ca is the correct abbreviation for calcium, and K is reserved for potassium. The naming conventions for elements often reflect their Latin roots or historical context rather than their English names, which is why potassium is represented by K, even though the first letter of “potassium” is not K.