Must be Selenium (Se). It is two space away from Kr, which means that it needs two extra electron to be like a noble gas, Kr.
Agamma ray<span> is a </span>very high speed particle<span> with </span>no charge<span>.</span>
Answer:
faulse
Explanation:
this is an example of a change in proporties
The answer I got is 151. 5 K. I hope that helps.