Why does negative energy means attraction and positive repulsion in chemistry?

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Solution

1. Attraction leads to stability and when a substance is stabilised it is least energetic and releases energy. So, when we get energy from the system, the energy is negative energy.

2. Repulsion leads to un-stability and when a substance is not stabilised it is most energetic and adsorbs energy from the environment. So, when energy is taken from the system it is positive energy.

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