A is your answer.
On the periodic table the atomic number is the number of protons inside the nucleus.
D. All of the above. Developing medicine, analyzing compounds and producing new product such as plastic all have to deal with chemistry.
They are odourless, colourless monatomic gases with full outer shells
Answer: -40
Explanation: Percent error is calculated by subtracting the value you actually recieved from the literature value (175 in your case) SO your answer should be 135-175=-40.
