Choose all the answers that apply. which of the following equations are balanced?
2h2 + o2 → 2h2o
2s + 3o2 → 2so3
li + cl2 → licl
2k + 2h2o → h2 + 2koh
2fe + cu(no3)2 → 2cu + fe(no3)2

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

i think? ?

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.