Question

2. What are (a) normal elements, (b) harmful
elements? Give two examples of each.​

Answer 1

Answer:

Normal element-Halogen family: Group 17 elements—fluorine (F), chlorine (Cl), bromine (Br), iodine (I) and astatine (At). ... Normal elements: Elements belonging to the s- and p-blocks in the periodic table are called the normal elements or main group elements

Bad element-Other big-bad-super-radioactive elementsinclude all that stuff at the bottom of the periodic table: neptunium, uranium, curium, and americium. Mercury (Hg): Mercury's another one of those "I'm pretty sure that's bad" elements. Mercury is extremely toxic to humans and is easily absorbed through unbroken skin.

example of bad element- Plutonium (Pu): A quick web search will tell you that, like, everyone thinks plutonium is super dangerous. ...

Mercury (Hg): Mercury's another one of those "I'm pretty sure that's bad" elements

example of normal element-Hydrogen.

Helium.

I hope I will help you