A semipermeable membrane is any biological or synthetic membrane that allows certain molecules or ions to pass through while restricting others.
Natural gas is not a fossil fuel
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Answer : A metal in group 16 of the periodic table can become a chemically stable ion by gaining 2 electrons.
Explanation :
The group 16 element are oxygen, sulfur, selenium, tellurium and polonium.
The general electronic configuration of group 16 elements is, 
As we now that there are total 6 electrons in p sub-shell. So, a metal in group 16 can become a chemically stable ion by gaining 2 electrons.

Hence, a metal in group 16 of the periodic table can become a chemically stable ion by gaining 2 electrons.
<span>she opens her eyes but does not answer any questions.
This is because she is suffering from dementia. She does not know what to do in your shoes anymore because she lost her humantiy.</span>