Question
True or false? The first three elements in group 1 of the periodic table are less dense than water. TRUE FALSE Group 1
Answer
4.2
(242 Votes)
York
Master · Tutor for 5 years
Answer
A
Explanation
The question is concerning the density of the first three elements - Hydrogen, Lithium, and Sodium - in group 1 of the Periodic Table. They share these qualities because they belong to the same periodic group. However, these elements increase in density as you move down the periodic group. Hydrogen is a gas so it is not relevant to compare its density to water. As for the lithium and sodium, they are less dense than water which means that they can float on water.