10 down: Particle with no charge
Answer: Neutron
Burning wood because heat indicates a chemical change
Sedimentary rocks are classified on the basis of the texture (grain size) of the rock, and composition.
1. 2CaS + 2H2O --> Ca(HS)^2 + Ca(OH)^2
2. Au^2S^3 + 3H2 --> 2Au + 3H2S
The answer is C because it's asking for the location, not the type of element it is like a metal, nonmetal, or metalloid.
