18
In chemistry, a group is a column of elements in the periodic table of the chemical elements. There are 18 numbered groups in the periodic table; the f-block columns are not numbered.
The act of using senses or tools to gather information is making an observation
Answer:
Explanation:
So basically it just asking you question about that surtain subject .
3 Primary Consumers: Grasshopper, Praying Mantis, Mouse
3 Secondary Consumers: Hawk, Raccoon, Snake
By the Way: This is Biology, not chemistry
Vaporizing a substance so the answer is D
