Answer:
group 1, 2 and 3 tend to get rid of electrons and start to form compounds with groups 7, 6, and 5.
Explanation:
If the enthalpy change is negative, then the reaction is exothermic because heat energy was lost to the surroundings.
If the enthalpy change was positive, then the reaction was endothermic because heat energy was gained from the surroundings!
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Answer:
heres the link of the answer
boldniwally.com
Which sequence repesent matter that is losing energy
answer: solid liquid gas
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I don't know sorry just google it
