Which of the following elements will most likely form an anion to achieve an octet?

Ibelieve the answer is d

I'm sorry i cant you if you don't list the elements : (

Adialysis unit requires 78.5 l of water.the estimated digit is 5. 

The answer to the question: choose the correct statement.  a) when ethane reacts with fluorine gas the product is less stable.b) addition reactions of unsaturated hydrocarbons and halogens requires a high activation energy.  c)the double covalent bond within unsaturated hydrocarbons requires a lot of energy to break.  d)the double covalent bond within unsaturated hydrocarbons can be broken easily.is: a) when ethane reacts with fluorine gas the product is less stable.