Collision with a high-speed particle
OD.......................
I think it would be the sun because it’s the one giving energy to most things, and if you haven’t answered it yet you can put the sun because it’s giving energy to the plans and the environment and it’s the the sun was the effect of the whole thing, sorry if I didn’t help
Answer: 4. A solution in which methyl orange is red
Explanation:
The others solutions are in their basic form while methyl orange is in it’s acidic form when red.
Mendeleev left gaps in the periodic table because, in the future, he knew that there would be more elements to be discovered because not all elements were discovered at the time.