Lol anyone wanna with my chemistry? i suck at it and any at all would be appreciated.

1. absorbs positron?? > answers is third one. 64 Ni 28
2. beta plus decay
3. nucleide symbol question===> last choice, 228 Ra 88
4. phosphorus question===> third choice. 
5. first choice===>    +1 e

Answerδh > 0explanationc₆h₆  (s)  → c₆h₆ (l)if you are changing it from a solid to a liquid, you are pretty much melting the solid. this requires heat energy. therefore, the reaction is endothermic (takes in energy); the system enthalpy increases as the reaction proceeds: δh > 0.