Answer:Carbon has four valence electrons, so it can achieve a full outer energy level by forming four covalent bonds. When it bonds only with hydrogen, it forms compounds called hydrocarbons. Carbon can form single, double, or triple covalent bonds with other carbon atoms.
Explanation:
The thing that makes kes73 interesting to astronomers is ; ( A ) A second star.
kes73 is believed by astronomers to have come from the explosion of dying stars in the supernova. The gases from the dying stars explode and scatter across forming a colorful cloud known as kes73.
At the center of the colorful cloud formed from the gases of the dying stars is a second star ( magnetar ) which is the most powerful star in the galaxy due to its magnetic force.
Hence we can conclude that the thing that makes kes73 interesting to astronomers is the presence of a second star
Learn more : brainly.com/question/24245572
TRY AND SEARCH IT UP ON GOODLE BC THEY HAVE ALOT OF ANSWERS
Answer:
C. visible
Explanation:
Well, you can't see ultraviolet light. Nor can you exactly see gamma or infrafred light. Visible light seems like the more reasonable answer.
Ice age. It caused saber tooth and mammoth to die