Question

Which one of the following is lighter than water?
(a) aluminium (b) chalk (c) ice (d) lodine​

Answer 1

Explanation:

Two other metallic elements are less dense than water. Potassium has a density of 0.862 g/cm3 while sodium has a density of 0.971 g/cm3. All of the other metals on the periodic table are denser than water. While lithium, potassium, and sodium are all light enough to float on water, they are also highly reactive.

Answer 2

Answer:

chalk

is the answer....