In a solution with a pH of 10.4… A. [H3O+] > [H2O]

B. [H2O] < [OH-]

C. [OH-] < [H3O+]

D. [H3O+] < [OH-]

E. [OH-] = [H2O]

answersilicon (si); oxygen (o);

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.

qualitative observation deals with data that can be observed with our senses: sight, smell, touch, taste, and hearing. they do not involve measurements or numbers. for instance, colors, shapes, and textures of objects are all qualitative observations.