Describe the physical properties of gold.

Gold is very dense; it is about 19 grams per cm^3

It is malleable and ductile:

It is yellow in color.

It is opaque (can't see through it).

It is not particularly hard (about 2.5 on the moh's scale. That means it is not water, but it is soft. In pure form, it can be scratched with your finger nail.

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.