If an atom suffers from a collision, that causes an electron to jump from a lower to higher state, it is called collisional excitation
Always. You never know what kind of chemical you’re dealing with and how powerful it is.
3 is C i believe, and as for 4 minerals are solid, natural.. that's about all I can say...
The answer is the first option, <span>∆G is positive.</span><span> </span><span>Endergonic reaction is a chemical reaction where the Gibbs free of energy is positive and there is abosrption of energy. It is a nonspontaneous reaction or unfavorable reaction.</span>
Atomic number shows the number of protons in an atom's nucleus. If the atomic number is 30, then it has 30 protons. The question says it is neutral, so it must have the same amount of protons and electrons.
A is the correct answer based on this.
