Would appreciate it if this was answered asap- it's for my chem exam What will happen to an unstable nucleus of radium-226?
-It will decay spontaneously.
-It will absorb electrons spontaneously.
-It will absorb protons from a parent atom.
-It will decay nonspontaneously.

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

if you need further assistance, let me know: )

~ trueboss72

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.