Question

the elements found in family 1 of the periodic table are so soft that they can be cut with a knife. what other property do these metals share?
a. they do not combine readily with other elements
b. they are brightly colored and are used to make pigments
c. they are often found as single elements in nature
d. they produce extreme heat when mixed with water

Explanation:

Elements in Family 1 (alkali metals) are highly reactive. They react vigorously with water, producing extreme heat and hydrogen gas. They combine readily with other elements and are not found as single elements in nature. They are usually silvery - white and not brightly colored for pigment use.

Answer:

D. they produce extreme heat when mixed with water