Match the element with its number of valence electrons. column a 1. boron : boron 2. carbon : carbon 3. fluorine : fluorine 4. sodium : sodium column b a. 4 b. 1 c. 3 d. 7

radioactive decay occurs in unstable atomic nuclei – that is, ones that don't have enough binding energy to hold

the nucleus together due to an excess of either protons or neutrons.

i think it is true since you can test the answer and can use observations to complete it.