Answer:
the fixed amount of energy that a system described by quantum mechanics, such as a molecule, atom, electron, or nucleus, can have.
Explanation:
Energy levels (also called electron shells) are fixed distances from the nucleus of an atom where electrons may be found. Electrons are tiny, negatively charged particles in an atom that move around the positive nucleus at the center. Energy levels are a little like the steps of a staircase.
The word pair that would be best to complete the analogy: emblem:insignia is the guard:sentinel. An analogy is a similarity of both things. The words guard and sentinel share the same meaning just like the analogy; emblem:insignia. The answer is the analogy guard:sentinel.
Answer:
This quarantine period is very special. This is the longest Lunar New Year holidays for children ( 3 months ) in my country. So many announcements about the number of deaths and new cases were made everyday, and even little kids were interested in them. This period have taught us a lot, especially "teamwork" skills - together, We Will Win the Virus, even when many of people have lost their work...
Explanation:
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