Since a element has a ph number of 7, meaning it is that element can be classified as neither a or a

also, is this a balanced equation?

c4 + o2 > 4co + o2

If a number has a pH of 7, it is neutral, therefore, one blank is neutral. 

1. Neutral

Therefore, the element is not an acid or a base.

2. Acid, Base

That is NOT a balanced equation because:

c=4    o=2
c=4     o = 6

Not balanced, o has 6 and one side it has 4. It contradicts the Law of conversation of mass. 

C. definite shape, definite volume. that is a solid.