Answer:
Chlorine and Fluorine
Explanation:
When you look at our descriptions of the elements fluorine and chlorine, you will see that they both have seven electrons in their outer shell. That seven-electron trait applies to all of the halogens. They are all just one electron shy of having full shells.
A star will ultimately become a black hole when it collapses due to end of fuel.
<h3>Which star becomes a black hole?</h3>
When a star burns through the last of its fuel, the object may collapse, or fall into itself. For smaller stars which are about three times the sun's mass, the new core will become a white dwarf but when a larger star collapses, it turns into a black hole.
So we can can conclude that a star will ultimately become a black hole when it collapses due to end of fuel.
Learn more about star here: brainly.com/question/10597324
I ain’t never seen two pretty best friends
Hi!
So, nuclear power plants are interesting. Many people may automatically assume that they will 'pollute' our atmosphere, but they do <em>not </em>produce pollution!
There is one <em>very </em>serious issue with nuclear power plants, however. If not handled properly, we can spill serious radioactive material. This material can be <em>deadly. </em>
Another issue is that it is not a renewable source. It won't last forever, so we will eventually have to find another alternative.
On the flip side, nuclear energy is <em>extremely </em>efficient and powerful. It is also a fairly clean way to gather energy, which makes it an attractive option knowing the state of our environment.
Hopefully, this helps! =)