high-risk-not financially safe or secure; a bad investment; high risk investments; anything that promises to pay too much can't help being risky; speculative business enterprises. speculative, risky, bad. unsound-not sound financially; unsound banking practices.
Iodine has seven valence electrons. Valence electrons of an atom are located in the outermost shell of the atom and participate in bonding. If an... Become a Study.com member to unlock this answer!
Best Answer: Iodine is one of those few elements that has only one stable isotope. There are over 40 isotopes of I, but only one stable isotope, and it has a mass number of 127. The remaining isotopes of iodine can have a wide range of mass numbers. http://www.dayah.com/periodic/ indicates that there are mass numbers for iodine from 108 to 144.