Pls no links and no copying from other websites Score for Question 1: ___ of 5 points)

1. Consider the equation:S+3O2 → SO3

Is this equation balanced? Why or why not?

Type your answer here:

(Score for Question 2: ___ of 5 points)

2. How do you know if a reaction is endothermic?

Type your answer here:

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.