Indicate the changes in the secondary and tertiary structural levels of proteins for each of the following: a. Tannic acid is placed on a burn.
b. Milk is heated to 60 CC to make yogurt.
c. To avoid spoilage, seeds are treated with a solution of HgCl2.
d. Hamburger is cooked at high temperatures to destroy E. coli bacteria that may cause intestinal illness.
e. Heavy metals, such as lead and mercury, are toxic for humans.

idk what the question is about

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.