Answer: The brightness of our if betelgeuse were to explode as as a supernova would by getting the ratio betelgeuse to sirius. Which would then be:
Apparent brightness of Betelgeuse
÷ Apparent brightness of Sirius=
6.9×10^4 Lsun.
your answer is d hope this helps
I think the answer would be c
The answer is D, noble gases are stable.
Answer:
it will option B , hope it helps
