Answer:
Boron (B) Atomic Mass: 10.811
Explanation:
The number of protons and electrons are the same, always. You can find the atomic mass by looking at the periodic table for that atom: 10.811
You can take two liquids of different densities (how much mass is in a given volume) and pour them into a funnel. An example is oil and water. When the mixture settles, the denser liquid will be at the bottom, and drips through the funnel first. This is a separation that you can just let occur naturally.
Only one atom because atom with 17 electrons need that one electron to become stable
I would think that b would be the right answer
The same column elements are called "groups" these are elements have the same outer electron arrangement which would lead to similar physical and chemical behavior. Hope this answers the question. Have a nice day. Feel free to ask more questions.
