Question

Which reactive metal is found in compounds constituting limestone, chalk, cement, as well as the bones and teeth of animals? Additionally, it is an essential element found abundantly in milk, contributing to its nutritional value.

Options:
A) Iron
B) Sodium
C) Calcium
D) Magnesium

Answer 1

Calcium is the metal found in limestone, chalk, cement, and is essential for bones and teeth, contributing to the nutritional value of milk.

Step-by-step explanation:

The reactive metal found in compounds constituting limestone, chalk, cement, as well as the bones and teeth of animals, and which is an essential element found abundantly in milk contributing to its nutritional value, is Calcium (C). Calcium compounds are widely found in limestone, marble, and chalk. Additionally, calcium is an important constituent of cement and plays a crucial role in the health and development of bones and teeth.