Physical and Chemical Changes During Digestion (7.6): Question 2
The diagram illustrates the pathway and time frame for the digestion of a hamburger. During which time period is matter undergoing only a physical change?
Select one:

9:50 a. m. - 1:00 p. m.

6:03 p. m. - 6:06 p. m.

6:03 p. m. - 10:15 p. m.

10:15 p. m. - 9:50 a. m.

one state would change   like louisiana to texas. thats a change

explanation:

a

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.