Answer
Two different elements have similar chemical properties when they have the same number of valence electrons in their outermost energy level. ... Elements in the same column of the Periodic Table have the same number of valence electrons – that's why they have similar chemical properties.
You will get at first carbon dioxide by burning C:

Burn hydrogen to obtain water:

Combine them:

Now react it with Ba:

To sum up, the reaction is

, using hydrogen as a catalyst.
Answer:
1. They are produced by the hottest and most energetic objects in the universe, such as neutron stars and pulsars, supernova explosions, and regions around black holes.
2. On Earth, gamma waves are generated by nuclear explosions, lightning, and the less dramatic activity of radioactive decay.
3. Scientists can use gamma rays to determine the elements on other planets.
Explanation:
the explanation is above lol
Answer:
visible light falls between which set of waves within the electromagnetic spectrum?
D.) infrared and Ultraviolet