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Here is the link to a great video that explains your question nicely, hope this helps.
Answer:
a community or group of living organisms that live in and interact with each other in a specific environment.
Explanation:
A. electron. The nucleus has protons and neutrons, quark is the particle which forms protons and neutrons.
Answer: Another useful feature of the periodic table is that most tables provide all the information you need to balance chemical reactions at a glance. The table tells each element's atomic number and usually its atomic weight. The typical charge of an element is indicated by its group.
Explanation:
The answer is C ionic bonds