In glass 1, the water was 50 degrees, and it took 30 seconds for the tablet to dissolve.
In glass 2, the water was 10 degrees, and it took 100 seconds for the tablet to dissolve.
Based off of this information, we can conclude that the colder the water, the longer it takes for the table to dissolve. The reverse is also true. As the water gets warmer, the rate at which the tablet dissolves gets quicker.
A chemical element that has an atomic number less than 58 and an atomic mass greater than 135.6m is barium (atomic no. 56 and atomic mass137.13 ) and lanthanum (atomic no. 57 and atomic mass 135.6).
<h3>Give a brief introduction about Barium and Lanthanum.</h3>
Barium
Barium is an element with the symbol Ba and atomic number 56. It is an alkaline earthmetal that is soft and silvery, and it is the fifth element in group 2. Barium is never found in nature as a free element due to its extreme chemical reactivity. Oil well drilling fluid uses barium sulfate as an insoluble ingredient. It is employed as an X-ray radiocontrast agent in a purer form to image the human gastrointestinal tract. Barium compounds that dissolve in water have been employed as rodenticides despite being hazardous.
Lanthanum
Chemical element lanthanum has the atomic number 57 and the symbol La. It is a silvery-white, ductile, soft metal that slowly tarnishes when exposed to air. It serves as the eponym for the group of 15 related elements in the periodic table between lanthanum and lutetium, of which lanthanum is the first and prototype. The rare earth elements traditionally include lanthanum.
