Question

Plentiful in the earth's crust, these soft metals are silver to white in color. They are found most often bonded to elements like fluorine and zinc. Due to their 2 valence electrons their reactivity is less than their very reactive neighbors. Under a UV light these elements fluoresce and are useful in many applications. Who are they?

A. Copper and gold
B. Aluminum and magnesium
C. Sodium and potassium
D. Calcium and strontium

Answer 1

The elements described in the question are calcium (Ca) and strontium (Sr) of the alkaline earth metals. They are silver to white in color, less reactive than their neighbors, and fluoresce under UV light.

Step-by-step explanation:

The elements described in the question are the alkaline earth metals, specifically calcium (Ca) and strontium (Sr). These metals are silver to white in color and are found bonded to elements like fluorine and zinc. They have 2 valence electrons, which makes them less reactive than their highly reactive neighbors. Additionally, they fluoresce under UV light and are useful in many applications.