Answer:
Iodine
Explanation:
Iodine is in group 17 on the periodic table (first picture attached). The second picture shows you in the top left-hand corner of Iodine's little square, there is the number 53. This is the atomic number, it is also the number of protons and electrons in an element.
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Answer:
Scientists can ensure their results are reliable by making multiple observations and repeating trials during experimentation. They should also use proper units to communicate with other scientists, and make sure the experiment is repeatable.
Explanation:
Answer:
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