If I add up the atomic numbers of the elements tin-119, I, boron, and the element in the 17th group of the 4th period on the periodic table, what total value would I get?

A) the enthralling of formation for pure element in its standard state is always positivehope this : )

Idon’t know what the answer is i wish i could

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.