I answered all of them except 2 for you to do
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Answer:In physics, a conservation law states that a particular measurable property of an isolated physical system does not change as the system evolves over time. Exact conservation laws include conservation of energy, conservation of linear momentum, conservation of angular momentum, and conservation of electric charge. Wikipedia
Explanation:
Atoms of the same element with different mass numbers are called isotopes
Energy is released when a new bonds form.
